You are studying a mutation in a species of butterflies (with ZW sex chromosomes) that causes solid wings instead of spotted wings. Describehow you would use areciprocal crossto test whetherthis trait is sex linked. What result would you expect if the trait is Z linked?What result would you expect if the trait is autosomal?
Q: Two plants in a cross were each heterozygous for two gene pairs (Ab/aB) whose loci are linked and 25…
A: Chromosomes are thread-like structures found in the nucleus of plant and animals. DNA is packed into…
Q: The gene for hair color in rabbits has two alleles brown and white. Brown is dominant over white.…
A: Genetics is a branch of biology that deals with the study of genes, genetic variation and heredity…
Q: In the video game Animal Crossing: New Horizons, flowering breeding is based in genetics. Each…
A: Sir Gregor Johann Mendel performed his famous experiments on pea plants and laid the foundation of…
Q: In currant moths, their Light color is sex-linked and recessive (d) to dark color (D). Question:…
A: In genetics, The sex linked inheritance is a type of inheritance pattern in which sex chromosome X…
Q: A cross is carried out between genotypes AaBBCcddEe and AaBbccDdEE. How many phenotypes are possible…
A: Phenotype is the external appearance of an organism.
Q: Based on the information you discovered in the previous problem, answer the following:a. A female…
A: Genes are the basic unit of inheritance and are responsible for all the observable and genotypic…
Q: Let’s suppose a genetic disease is caused by a mutantallele. If two affected parents produce an…
A: Genetic disease is defined as an inherited medical condition or state caused by an abnormality in…
Q: You are trying to determine whether a horn shape (curved = dominant, straight = recessive) in cows…
A: A Test Cross is performed between one unknown genotype and one true-breeding recessive genotype to…
Q: An allele in Drosophila produces a star-eye trait in the heterozygous individual. However, the…
A: Homozygote refers to the individuals having two identical alleles of a particular gene in contrast…
Q: Do you think mendal's law of inheritence would have been different if the character that he choose…
A: Gregor Mendel was a scientist who worked in the field of molecular biology and genetics. These…
Q: In a test cross between an individual with an unknown genotype that exhibits the dominant phenotype…
A: A test cross is done between an individual with an unknown genotype and a known individual with a…
Q: Based on the ideas proposed by Morgan, which of the followingstatements concerning linkage is not…
A: Answer is c.) A Cross-over is more likelt to occur in a region between two genes that are close…
Q: Imagine you have two pure-breeding lines of canaries,one with yellow feathers and the other with…
A: Pure breeding or true-breeding lines of organisms are a group of organisms that always passes down…
Q: As a Drosophila research geneticist, you keep stocksof flies of specific genotypes. You have a fly…
A: Genes are the fundamental units of inheritance so they are responsible for all the genotypic…
Q: The pea plants used in Mendel’s genetic inheritance studies were diploid, with 14 chromosomes in…
A: Crossing over can be defined as the exchange of chromosome segments between the non-sister…
Q: Duchenne muscular dystrophy is sex linked and usuallyaffects only males. Victims of the disease…
A: Duchenne muscular dystrophy is an X-linked recessive disorder. Males have an XY chromosomal pattern,…
Q: Would it be possible to deduce the law of independent assortmentby analyzing the results of…
A: Sir Gregor Mendel was a priest and a teacher who did the famous hybridization experiment on garden…
Q: Suppose the mating had occurred between an male with a given disease (homozygous recessive) and a…
A: Aa x aa heterozygous female x homozygous male A a a Aa aa a Aa aa
Q: In a dihybrid cross of two heterozygous individuals, you expect a 9:3:3:1 phenotypic ratio in the…
A:
Q: Three genes in fruit flies affect a particular trait, andone dominant allele of each gene is…
A: Let us represent the three different genes responsible for the wildtype trait as A, B, and C. The…
Q: could the genes of any two traits be located on the same chromosome? why or why not?
A: A gene is the determinant of a characteristics pertaining to a particular organism. Mendel used the…
Q: Does thephenotype of an organism automatically change when achange in genotype occurs? Why or why…
A: In biology, any measurable attribute or trait, whether acquired or inherited, of an organism. An…
Q: Assuming (i) that the two chromosomes in everyhomologous pair carry different alleles of somegenes,…
A: Homologous chromosomes are the ones that share some morphological features and have similar genetic…
Q: How many different kind of gametes could each of the parents produced?
A: Mendel did many of cross-breeding experiments. His key finding was that there were 3 times as many…
Q: A man has attached earlobes, whereas his wife has freeearlobes. Their first child, a boy, has…
A: Genetics is a tricky affair. It is the study of pattern of inheritance of the of traits from the…
Q: If two brown mice are bred together, 35 of their 100 offspring are white. You hypothesize that the…
A:
Q: You perform a cross between a parent with the genotype WWiiNNttEErr and another parent that is…
A: Linked genes are genes that are located adjacently on the same chromosome. The linked genes do not…
Q: In this pedigree, which parent-child pair allows you to reject the hypothesis of dominant X-linked…
A: Sex-linked dominant: In this type the gene or condition is dominant type which means expressed in…
Q: A cross is made between two plants with five independently assorting genes. SHOW YOUR WORK AA Bb Dd…
A: Given- A cross is made between AA Bb Dd Ee hh X Aa Bb Dd ee Hh. They are independently…
Q: In humans, color vision depends on genes encodingthree pigments. The R (red pigment) and G (green…
A: Genetics is a part of science that deals with the investigation of genes, genetic variation, and…
Q: If you had a fruit fly (Drosophila melanogaster) that wasof phenotype A, what cross would you make…
A: The working segment of DNA that mainly codes for proteins is a gene. Genetics is the study of genes.…
Q: In a mendelian monohybrid cross, which generation is always completely heterozygous? A) F2…
A: Mendel contributed a lot to the field of genetics. He postulated various laws – Law of dominance,…
Q: A cross was made between a white male dog and two different blackfemales. The first female gave…
A: Mendelian inheritance refers to an inheritance pattern that follows the law of segregation and law…
Q: Fruit flies having one allele for curly wings (Cy) and one allele for normal wings (Cy+) develp…
A: Fruit flies (Drosophila melanogaster) are small insects which are usually found in homes, hotels as…
Q: In radishes, color and shape are each controlled by asingle locus with two incompletely dominant…
A: In radishes, a single locus contains two alleles which are incompletely dominant, and a single locus…
Q: Explain the rationale behind a testcross. Is it necessary for one ofthe parents to be homozygous…
A: Genetics is the study of inheritance of characters which is the heredity and the variation of the…
Q: What is the probability that the following cross will produce an organism homozygous recessive for…
A: A homozygous recessive organism have allele combination which contains two recessive alleles and…
Q: When Mendel did crosses of true-breeding purple- and white-floweredpea plants, the white-flowered…
A: Gregor Mendel discovered the fundamental rules of inheritance after his studying the breeding of…
Q: Morgan first suggested that theoriginal white-eyed male had two copies of the white-eye allele.…
A: Genetics is a study of genes, heredity, and genetic variation in an organism. Living organisms…
Q: 45
A: Genes are the functional units of heredity. It contains information that is transferred from one…
Q: In a particular plant species, purple flowers (P) are dominant to pink flowers (p). A plant that has…
A: The alleles are generally of dominant and recessive type and some other forms like codominant are…
Q: A researcher crossed a homozygous yellow seed plant (YY) and a heterozygous yellow seed plant (Yy).…
A: The first law of inheritance is known as the dominance law. Every character in this rule is…
Q: Construct a Punnett square for a cross between a heterozygous black guinea pig and a homozygous…
A: The alleles are generally of dominant and recessive type and some other forms like codominant are…
Q: . A dark female moth is crossed with a dark male. All themale progeny are dark, but half the female…
A: The allele A is dominant over a. So, the moth with 'AA' and 'Aa' will be dark-colored. Moth with…
Q: In pea plants, tall (T) is dominant to short (t). If an offspring pea plant is "tt", what are its…
A: The Correct answers for the question are: Tt X tt Tt X Tt
Q: The gene 'aggregate' (ag) is located 4 map units from gene blotched (bl). You are going to collect…
A: It is given that the genetic distance between aggregate and blotched is 4 map units. That's why the…
Q: Most of the feathers of erminette fowl are light colored, with an occasional black one, giving a…
A: Gregor Johann Mendel is usually defined as the way that they are been regarded as the father of…
Q: Mendelian Genetics The presence of a dimple on the cheek is governed by a dominant gene. A couple…
A: Heterozygous means that you acquired different versions of a gene from each of your parents. A…
Q: In rabbits, black hair is due to a dominant allele B and brown hair to its recessive allele b. Short…
A: Hello. Since your question has multiple sub-parts, we will solve first three sub-parts for you. If…
You are studying a mutation in a species of butterflies (with ZW sex chromosomes) that causes solid wings instead of spotted wings. Describehow you would use areciprocal crossto test whetherthis trait is sex linked. What result would you expect if the trait is Z linked?What result would you expect if the trait is autosomal?
Step by step
Solved in 3 steps
- Assuming that independent assortment occurs during meiosis, what type(s) of gametes will form in individuals with the following genotypes? a. AABB b. AaBB c. Aabb d. AaBbMorgan first suggested that theoriginal white-eyed male had two copies of the white-eye allele. Inthis problem, let’s assume that he meant the fly was XwYwinstead ofXw Y What crosses would need to be made to rule out the possibility thatthe Y chromosome carries a copy of the eye color gene?A man has attached earlobes, whereas his wife has freeearlobes. Their first child, a boy, has attached earlobes.a. If the phenotypic difference is assumed to be due totwo alleles of a single gene, is it possible that the geneis X linked?b. Is it possible to decide if attached earlobes aredominant or recessive?
- Doing genetic analysis it is determined that two parents are heterozygous for two separate unlinked recessive traits (i.e., both parents are heterozygous for both loci). Given this genetic information, what is the probability of their having a child which is homozygous recessive for both traits?a human disease known as cystic fibrosis is inherited as a recessive trait.Two unaffected individuals have a first child with the disease. What isthe probability that their next two children will not have the disease?You are studying ear shape in dogs (with XY se x determination) and cross a true-breeding pointed-ear female to a true-breeding floppy-ear male and collect all pointy-ear male and female offspring. Your colleague suspects that the two phenotypes may be caused by alleles of one X-linked gene. What sort of cross would you do to determine whether this is an X-linked trait? Name it and describe it. What offspring phenotypic ratio would you expect in that cross if the green allele is a dominant X-linked allele? Make sure to label your ratio with all relevant phenotypes. How would the result of your cross (from A) be different if the trait is autosomal
- You are studying tail length in a species of mice, where some mice have long tails and some have short tails.Preliminary results show that long tail is dominant, but you think the trait may be X-linked. Give the expectedoffspring phenotypic ratio for each cross if the trait is X- linked or if it is autosomal and answer the question atthe end. Make sure your phenotypic ratio is labeled with the complete phenotype (all relevant details). Cross #1: true-breeding long-tailed male x true-breeding short tailed female• Expectation if X-linked?• Expectation if autosomal?Cross #2: true-breeding long-tailed female x true-breeding short tailed male• Expectation if X-linked?• Expectation if autosomal?Compare the four results listed above. Briefly, why is a reciprocal cross is necessary to determine X (or Z)linkage?To figure out the outcome of a cross, set up a Punnett square.a. Put the gametes of one parent at the top and those of theother on the left. To determine the allele(s) in each gamete fora given genotype, set up a systematic way to list all the possibilities. (Remember, each gamete has one allele of each gene.)Note that there are 2npossible types of gametes, where n is thenumber of gene loci that are heterozygous. For example, anindividual with genotype AaBbCc would produce 23 = 8 typesof gametes. Write the genotypes of the gametes in circlesabove the columns and to the left of the rows.b. Fill in the Punnett square as if each possible sperm werefertilizing each possible egg, making all of the possibleoffspring. In a cross of AaBbCc * AaBbCc, for example, thePunnett square would have 8 columns and 8 rows, so thereare 64 different offspring; you would know the genotype ofeach and thus the phenotype. Count genotypes and phenotypes to obtain the genotypic and phenotypic ratios. Becausethe…In a test cross between an individual with an unknown genotype that exhibits the dominant phenotype and a known homozygous recessive individual all progeny showed the dominant phenotype. The individual of unknown genotype is therefore Choose an answer below: homozygous for that gene. heterozygous for that gene. heteromorphic for that gene. heterosexual for that gene. homogametic for that gene.
- Most of the feathers of erminette fowl are light colored, with an occasional black one, giving a fleckedappearance. A cross of two erminettes produced a totalof 48 progeny, consisting of 22 erminettes, 14 blacks,and 12 pure whites. What genetic basis of the erminette pattern is suggested? How would you test yourhypotheses?In humans, color vision depends on genes encodingthree pigments. The R (red pigment) and G (green pigment) genes are close together on the X chromosome,whereas the B (blue pigment) gene is autosomal. A recessive mutation in any one of these genes can cause colorblindness. Suppose that a color-blind man married awoman with normal color vision. The four sons from thismarriage were color-blind, and the five daughters werenormal. Specify the most likely genotypes of both parents and their children, explaining your reasoning. (Apedigree drawing will probably be helpful.) (Problem 50is by Rosemary Redfield.)Assume that levi Fugate was not blue. What was only possible genotype ? why? Zachary fugate and his wife had % chance of having blue children. Draw a punnett square. Could Levi Fugate and his wife have had children with normal genotype (BB) Why and why not ?