3) What is meant by the term epistasis? Distinguish between epistasis not use ex

Question

3) What is meant by the term epistasis? Distinguish between epistasis not use examples in answering this question. ANSWER. Write the word or phrase that best completes each staten 14) Assume that a cross is made between two organisms that are both heterozygous for a gene that shows incomplete dominance. What phenotypic and genotypic ratios are expected in the offspring? . Write your answer ?n the space provided or on a separate sheet of paj 15) Name four modes of inheritance that are influenced by the sex of Inc 16) The white-eye gene in Drosophila is recessive and sex-linked. Assume white-eyed female is mated to a wild-type male. What would be the the offspring? RT ANSWER. Write the word or phrase that best completes each statemer tion. 17) Two forms of hemophilia are determined by genes on the X chromosome in humans. Assume that a phenotypically normal woman whose father had hemophilia is married to a normal man. What is the probability that their first son will have hemophilia? 18) Two forms of hemophilia are determined by genes on the X 18) chromosome in humans. Assume that a phenotypically normal woman whose father had hemophilia is married to a normal man. What is the probability that their first daughter will have hemophilia? SAY. Write your answer ?n the space provided or on a separate sheet of paper. 19) State a significant difference between X-linked and sex-influenced inheritai 20) Pattern baldness s determined by a single autosomal gene pair. When fern homozygous for this gene pair, can they show pattern baldness?

Explanation / Answer

1:2:1, assume you cross organisms with genotypes - Aa x Aa, both are heterzygous, the cross will yeild progeny AA,Aa,aA,aa where AA will show dominant phenotype, Aa and aA will show incomplete dominance and aa will show recessive phenotype.

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