04: In mammals there is a species where yellow and brown hair are sex linked genes when these two genes are found in one organism it shows a lack of dominance character and the hair will look prange. What are the results for a male with yellow hair mating with a female brown hair?
Q: black cat mates with a white cat. They produce 4 black offspring and two white offspring. What is…
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Q: 6. Two black cats having small white patches mate: [NOTE: This is different from the question in the…
A: inheritance of a single gene is called as a monohybrid cross. Monohybrid cross involves hybrid of…
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A: Heterozygous means when a parent has both dominant and recessive allele of a gene.
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A: Introduction Incomplete Dominance Occurs When Both Alleles Of A Gene At A Locus Are Partially…
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A: So according to the law of assortment from Mendel's in dihybrid cross . This law states that…
Q: STEP 3: Monohybrid crosses a. Create a Punnett square illustrating the results of a mating between a…
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Q: 19. If you cross a homozygous dominant individual with a heterozygous individual, what percentage of…
A: Alleles are the alternative forms of a gene that are located on the same locus of a homologous…
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A: Epistasis is a non- allelic interaction in which one gene masks, inhibits or suppresses the…
Q: 1. A species of butterfly has three alleles for wing color: blue, orange, and pale yellow. A blue…
A: Let us assume that the dominant allele for blue wing color is B, orange is O and the pale yellow…
Q: 2. Horniess (H) in cattle is dominant over horned (h). A homozygous hornless bull is mated with a…
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Q: 9. In hamsters, black fur (B) is dominant over brown fur (b) and long fur (L) is dominant over short…
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A: Genetics is the branch of biology that deals with the study of genes, their variation, and heredity…
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A: Heterozygous A zygote is formed by fusion of two different types of gamete carrying different…
Q: 4. Two heterozygous black pigs are mated. Show the genotypes, phenotypes, and probabilities of the…
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A: Note: According to the guidelines, we are supposed to answer only three sub-parts (a, b and c).…
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- An attached-X female fly, XX ¬Y (see the “Insights and Solutions” box), expresses the recessive X-linked white-eye mutation. It is crossed to a male fly that expresses the X-linked recessive miniature-wing mutation. Determine the outcome of this cross in terms of sex, eye color, and wing size of the offspring..Certain forms of human color blindness are inherited as X-linkedrecessive traits. Hemizygous males are color-blind, but heterozygous females are not. However, heterozygous females sometimeshave partial color blindness.A. Discuss why heterozygous females may have partial color blindness.B. Doctors identified an unusual case in which a heterozygousfemale was color-blind in her right eye but had normal colorvision in her left eye. Explain how this might have occurred.Refer to question 5. Assuming complete dominance, the F2 generation will show a phenotypic ratio of ________. a. 3:1 b. 9:1 c. 1:2:1 d. 9:3:3:1 Question No. 5 5. The offspring of the cross AA aa are ________. a. all AA b. all aa c. all Aa d. half are AA and half are aa
- In certain salamanders, the sex of a genetic female can be altered, changing her into a functional male; these salamanders are called sexreversed males. When a sex-reversed male is mated with a normal female, approximately 23 of the offspring are female and 13 are male. How is sex determined in these salamanders? Explain the results of this cross.A family has an X-linked dominant form of congenital generalizedhypertrichosis (excessive hairiness). Although the allele is dominant,males are more severely affected than females. Moreover, the womenin the family often have asymmetrical, hairy patches on their bodies.How does X chromosome inactivation explain this observation?An insect species is discovered in which the heterogametic sex isunknown. An X-linked recessive mutation for reduced wing (rw)is discovered. Contrast the F1 and F2 generations from a crossbetween a female with reduced wings and a male with normalsizedwings when(a) the female is the heterogametic sex.(b) the male is the heterogametic sex.
- In individuals affected by cystic fibrosis, salt crystals may appear afterperspiration dries up. In addition, the disease causes respiratory disorderswhich can be both debilitating and lethal. It occurs in individuals homozygousfor recessive gene. If 2 normal parents had a daughter with the symptoms ofthis disease, and a normal son, what is the probability that he might be acarrier of the recessive gene?Express answer in fraction form.In certain salamanders, the sex of a genetic female can be altered, changing her into a functional male; these salamanders are called sex reversed males. When a sex-reversed male is mated with a normal female, approximately 23 of the offspring are female and 13 are male. How is sex determined in these salamanders? Explain the results of this crossFive human matings numbered 1–5 are shown in the following table. Included are both maternal and paternal phenotypes for ABO and MN blood-group antigen status. Each mating resulted in one of the five offspring shown to the right (a–e). Match each offspring with one correct set of parents, using each parental set only once. Is there more than one set of correct answers?
- You have a female snail that coils to the right, but you do not knowits genotype. You may assume that right coiling (D) is dominant toleft coiling (d). You also have male snails of known genotype.How would you determine the genotype of this female snail? Inyour answer, describe your expected results depending on whetherthe female is DD, Dd, or dd.9. Eye color in fruit flies is a X linked trait. Red eyes (R) are dominant over white eyes (r) . What is the phenotype of an individual that is XRY ? 1. Female, red eye 2. Male, red eye 3. Male, white eye 4. Female, white eyeGiven your answers to below problem, is it possible to distinguishbetween the Protenor and Lygaeus mode of sex determinationbased on the outcome of these crosses? Probelm An insect species is discovered in which the heterogametic sex isunknown. An X-linked recessive mutation for reduced wing (rw)is discovered. Contrast the F1 and F2 generations from a crossbetween a female with reduced wings and a male with normalsizedwings when(a) the female is the heterogametic sex.(b) the male is the heterogametic sex.