a) What is the sexual phenotype of the F1 offspring?.. b) Another batch of five offspring are expected from the same parents. What is the probability of the first offspring having a long tail and black whiskers?
Q: A heterozygous free-lobed man is mated to a heterozygous free-lobed woman. What are the genotypes…
A: Genotype is the genetic makeup of an organism. It consists of 2 alleles in an individual.
Q: How can epistasis explain incomplete penetrance?
A: Penetrance in genetic terms refers to the ratio of individuals that carry a specific allele of a…
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A: Chromosomal abnormalities or aberration is defined as the defect in the structure or the number…
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A: A chromosome is an organized package of DNA found in the nucleus of the cell. Different organisms…
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A: * Aromatization is the biochemical process in which aromatase Enzyme catalyzes the conversion of…
Q: What is a Barr body? How is it related to the Lyon hypothesis?
A: Humans exhibit XX-XY type of sex determination.
Q: What is cross-fertilize?
A: Fertilization is the process by which the gametes (male gamete and female gamete) fuse with each…
Q: What genetic phenomenon does the production of a blue F1 from pink and white parents represent?
A: A gene is a unit of hereditary arranged in thousands on the double-stranded helical genetic…
Q: How do translocations in which no genetic information is lost or gained produce phenotypic effects?
A: Translocation is caused Due to separation of a chromosome segment and its union to a nonhomologous…
Q: How can you explain Incomplete Dominance among four o'clock flowers?
A: Mendel explained the concept of recessive and dominant inheritance.
Q: Why do the F1 chickens with genotype Cc Ii have white feathers?
A: In genetics, dominance is the phenomenon of one allele or variant of a gene on chromosomal masking…
Q: What occurs during crossing over?
A: Cell division is a process by which a cell divides into two or more daughter cells. cell division…
Q: What is the difference between the X-Y and X-0 systems of sex determination?
A: The biological system that is known to determine the development of sexual characteristics is known…
Q: Is it possible to determine the genotype of an individual having a dominant phenotype? How?
A: Phenotype refers to the set of observable characteristics in an organism. Although it is dependent…
Q: What would be the genotype of the P Generation?
A: Introduction: Genetics is a branch of biology that deals with the understanding of genes, variation…
Q: What is the reason for the white feathers of F1 hens with the Cc Ii genotype?
A: When one allele or variation of a gene on a chromosome masks or overrides the effects of a different…
Q: what are the reasons for the occurence of codominance and incomplete dominance traits?
A: Codominance is a term that refers to the link between two variants of a gene. Individuals inherit…
Q: If a mother snail is heterozygous, Dd, which gene products will the oocyte receive?
A: The mom's genotype specifically influences her offspring's phenotype Broken rule: gene expression an…
Q: Do you know what cross leads to the production of the mule?
A: Cross Hybridisation It is the result of interbreeding between two animals or plants of different…
Q: Which, if any, of the following sex-chromosome aneuploids in humans are fertile: XXX, XXY, XYY, XO?
A: Aneuploids are a kind of chromosomal mutations which results in abnormal number of chromosomes.
Q: What is meant by aneuploidy?
A: The chromosomes are thread-like structure located in the nuclei of both plant and animal cells. They…
Q: What is a Barr body, and where is it found in a cell?
A: A chromosome is a long DNA molecule with part or the whole hereditary material of a creature. Most…
Q: If two gene pairs A and a and Band b are assorting independently with A dominant to a and B dominant…
A: Mendels principle of independent assortment states that the genes assort independently at the time…
Q: What is meant by the term diploid? Which cells of the humanbody are diploid, and which cells are…
A: The ploidy term refers to the number of sets of the chromosomes. The euploidy refers to the…
Q: Can two normal individuals of the same species with sexual reproduction have identical genomes and…
A: Sexual reproduction requires gametes. Gametes are produced by meiosis. During meiosis, crossing over…
Q: What is the difference between cross-fertilization andself-fertilization?
A: Fertilization is the fusion of two gametes from either parent to give rise to a new offspring and…
Q: What hemispheric dominance?Explain
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Q: If the blue F1 females in are backcrossed to the blue males in the P generation, what phenotypes and…
A: Genotype is the genetic constitution of an individual organism. Phenotype is the observable…
Q: there are 120 pink flowers and 112 white collected as a result of the second filial generation. What…
A: Mendel performed his famous experiments on the pea plant and gave the law of inheritance. But it has…
Q: Is it possible for an unaffected female to havefemale offspring with red–green color blindness?
A: When the mutation is on the gene of the X chromosome, it is called the X-linked inheritance. As…
Q: a. What are the genotypes of the F2 generation? b. What are their phenotypes? C. Are there more or…
A:
Q: What is the maximum number of different alleles for a particular locus that can be present in a…
A: ANSWER: ALLELE- An allele is a variant form of a gene. and a gene is a sequence of nucleotides that…
Q: Is it possible for a sex-linked disease to pass from one generation to the next without appearing in…
A: Through either of the X or Y chromosomes, sex-related disorders are inherited from parents. Sex…
Q: What do the phenotypic ratios resulting from dominant epistasis depend on?
A: Dominant epistasis is the genetic condition where a dominant allele present at one locus will mask…
Q: What are matings between the F1 progeny of pure-breeding parents that differed in 3 or more…
A: Genes are known as the unit of heredity. Genes influence the outcome of organisms characteristics.…
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A: Angiosperms are flowering plants and also considered as a diverse group of terrestrial plants.
Q: Two parents of the same heterozygous genotype are involved in a tetrahybrid cross. Their genotypes…
A: According to the product rule the probability of two (or more) independent events occurring…
Q: why is it that a genotype of XXX may not cause any problems for human female?
A: Sex-determination is a biological system that determines the sex of an offspring based on different…
Q: What is chromosomal mapping?
A: A chromosome contains all of the genetic material of an organism. Almost all the eukaryotic…
Q: Which two genotypes are from flies when a double crossover occurred?
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: Are mules sterile because they are hybrids of two different species or because they have an odd…
A: A mule is the offspring of a male donkey (jack) and a female horse (mare). Horses and donkeys are…
Q: If a drone with short wings and black eyes was mated to a queen that is heterozygous for both genes,…
A: A genotype is a living being's complete arrangement of hereditary material. Regularly, however, a…
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A: A map unit is defined as the distance between two linked gene pairs where 1% of the products of…
Q: What is uniparental disomy and how does it arise?
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: What is the purpose of Barr bodies?
A: DNA is the genetic material in most living organisms. It is the information hub of the cell that…
Q: What is the difference between Epistasis and Incomplete Dominance?
A: Inheritance is defined as the passing of traits from parents to offspring.
Q: identify two main themes underlying the phenomena of chromosomal changes?
A: Chromosome is a compact structure of a DNA molecule wrapped around some proteins. It is generally…
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- Using Drosophila notation: A.) Diagram the genotype of a female fly that is recessive for apterus (ap, chromosome 2), heterozygous wild-type for black (b, chromosome 2), recessive for forked (f, x-chromosome), and homozygous wild type for rosy (ry, chromosome 3). B.) Diagram the genotype of a male fly that is heterozygous for clot (ct) eyes (an autosomal gene) and has yellow (y) body color (x-linked gene).1. In a particular bird species, the tips of the feathers are tinged with blue, white, or silver. The BB genotype calls for blue-tipped feathers. The WW genotype calls for white-tipped feathers. The BW genotype calls for an intermediate with silver-tipped feathers. A mating occurs between a blue-tipped bird and a white-tipped bird. What types of offspring would be expected? Give the genotypes and phenotypes of the possible offspring and the probability of each. 2. The bird species described in question 5 has an ornamental plumage on its head. The plumage feathers are either flexible or stiff. The allele for flexible plumage is dominant over the allele for stiff plumage. A male who is heterozygous for plumage and has silver-tipped wings mates with a female who has stiff plumage with silver-tipped wings. What types of offspring would be expected from this cross? Give the probability of each. 3. In some cats, the gene for tail length shows incomplete dominance. When a cat with a…EXAMPLE PROBLEM Two black female mice are crossed with a brown male. In several litters, female I produced 9 black offspring and 7 brown; female II produced 57 black offspring. What deductions can you make about the inheritance of black and brown coat color in mice? What are the genotypes of the parents? Dominance and recessive describe which of two possible phenotypes are exhibited when two different alleles occur in the same individual.
- Sex determination in birds is different from that in humans. The sex chromosomes in birds are called Z and W, because males have two of the same chromosome (ZZ), whereas females have two different chromosomes (ZW). There is a Z-linked allele in some birds that causes the death of the embryo when the normal dominant allele is not present. What would be the sex ratio in the living offspring of a cross between a male heterozygous for the lethal allele and a normal female? A) What are the genotypes of the parents? Male____ Female____ B) Which gametes would each form? Male____ Female____ C) Draw your Punnett square below and determine the sex ratios of living offspring.Drosophila have XX/XY sex determination systems just like mammals. In Drosophila, loci for both eye color and body color are on the X chromosome. Red eye color (R) is dominant to white eye color (r), and tan body color (T) is dominant to yellow body color (t). Which of the following is the genotype for a female with a yellow body and red eyes, who is homozygous for eye color? Group of answer choices XRT XrT XRt XRT XRt XRt XRt XRTPart 1 - With use of Punnett diagrams discuss how the results of experiments carried out by Austrian monk Gregor Mendel on pea plants brought about the Law of Dominance, the Law of Segregation, and the Law of Independent assortment. Part 2 - In humans, the gene that produces the disease Sickle Cell Anaemia is recessive to the gene for healthy haemoglobin production. a) How can two phenotypically healthy parents have a child who suffers from Sickle cell Anaemia? In your answer use suitable letters to show the genotypes of the parents and construct a Punnett diagram to show all the possibilities of the children's genotypes. b) Based on the outcome of your Punnett diagram, state and explain the probability of a child being a sufferer of Sickle Cell Anaemia and the probability of a child not suffering from the disease. c) If an individual who suffers from Sickle cell disease has a child with someone who is healthy (and not carrying the sickle cell gene), what is the probability that…
- 1. In humans, widow’s peak (W) is dominant over having a straight hairline (w). If a homozygous man with a widow’s peak has a child with a woman with a straight hairline, what are the odds the child will have a widow’s peak? Show work. 2. Ellis-van Creveld syndrome is a recessive inherited condition that results in 6-fingered dwarfism. Two parents without this condition have with Ellis-van Creveld syndrome. What are the genotypes of the parents and offspring? What are the odds that the son will have a 6-fingered child if his partner is a woman who is heterozygous for the condition? Show work. 3. The gene for dangling earlobes is dominant over the gene for attached earlobes. A woman with attached earlobes has a child with a man with dangling earlobes whose mother had attached earlobes. What is the probability that this child will have attached lobes? Show work. 4. In humans, normal pigmentation is due to a dominant gene, while albinism is recessive. A normally pigmented man has a…The inheritance of colour in domestic pigeons involves several genes. The dominance hierarchy of three colour alleles is ash-red > blue-black > brown (ZA > ZB > Zb ).These colours are carried on the Z sex chromosome. Unlike humans, female pigeons have two different sex chromosomes (Z and W) and males have two of the same kind of sex chromosome (ZZ). In birds, males have two Z sex chromosomes (ZZ) and females have one Z and one W sex chromosome (ZW). Since female birds have only one Z chromosome, they have only one copy of all Z-linked genes and they express the phenotype of the allele that they get.Barred is a sex-linked dominant trait in chickens. The barring allele causes white pigment in bars on a solid color producing an alternating pattern. The original solid color in the chickens below is black. The possible genotypes and their corresponding phenotypes are as follows: Genotype Gender Feather Phenotype ZBZB Male Barred ZBZb Male Barred ZbZb Male Black…Trisomy 21, or Down syndrome, occurs when there is a normal diploid chromosomal complement but one (extra) chromosome 21. While there is reduced fertility in both sexes, females have higher fertility than males. Van Dyke et al. (1995; Down Syndrome Research and Practice 3(2):65—69) summarize data involving children born of Down syndrome individuals. Given the fact that conceptuses with 48 chromosomes (four #21 chromosomes) are not likely to survive early development, what percentage of surviving offspring would be expected to have Down syndrome if both parents have Down syndrome All the children would be expected to have Down syndrome. One-third of the surviving offspring would be expected to have Down syndrome. Two-thirds of the surviving offspring would be expected to have Down syndrome. One-half of the surviving offspring would be expected to have Down syndrome.
- 12. A heterozygous agouti mink is bred with a true-breeding white mink. Of the three offspring, one is an agouti male, one is a white male, and one is a black female. What is thesimplest explanation as to coat colour inheritance in these mink? the agouti allele is sex-linked a single gene is involved with the agouti allele being dominant a single gene is involved with the white allele being recessive at least two genes are involvedWhich of the following findings supports the fact that the presence of the Y-chromosome rather than the lack of a second X-chromosome determines the development of maleness in mammals? a. A human with an X0 genotype (Turner syndrome) is phenotypically female. b. A human with an XXY genotype (Klinefelter syndrome) is phenotypically male. c. A transgenic mouse with two X-chromosomes and the SRY gene from the Y-chromosome develops male sex organs. d. b and c, but not a e. a, b, and cIn fruit flies, the dominant H allele gives rise to a hairless phenotype, hh gives rise to normal body bristles, and the HH homozygote condition is lethal during an embryonic stage. The presence of a dominant S allele suppresses the effect of the dominat H allele with respect to the body bristles phenotype such that normal body bristle phenotype is restored when only one dominant H allele is present (HH is lethal irrespective of the S or s alleles). The ss genotype has no effect over the H allele and the SS homozygote condition is also lethal during an embryonic stage. What would be the expected phenotypic outcomes among the surviving offspring from the following cross: HhSs X hhSs 2 normal body bristles: 1 hairless 7 normal body bristles: 2 hairless 1 normal body bristles: 1 hairless 3 normal body bristles: 1 hairless 5 normal body bristles: 1 hairless