Genetics, please show work. 8 A gene for examania (E) resides on chromosome13. T
ID: 133520 • Letter: G
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Genetics, please show work.
8 A gene for examania (E) resides on chromosome13. There are two alleles for this gene- EA and EF. An EAEA father and an EAEF mother produce a child with the genotype This was due to A Non-dysjunction in meiosisl in the father+ normal dysjunction in the mother B Non-dysjunction in meiosislI in the father + normal dysjunction in the mother C Non-dysjunction in meiosisI in the mother + normal dysjunction in the father D Non-dysjunction in meiosisll in the mother + normal dysjunction in the father E normal dysjunction in mother+ normal dysjunction in the father 9 A tall parent and a short parent produce F1 offspring that when self-fertilized produce a range of offspring heights, some taller that the tall P1 and some shorter than the short P2. Which set of parental genotypes could best account for these data A AABBCC x aabbcc B AABB x aabb C AABBcc x aabbCC D AAx aa E BBx bbExplanation / Answer
Please find the answers below:
Answer 8: Choice C (Autosomal trisomy of chromosomes takes place due to failure of disjunctioning of the chromosomes during meiosis I (Anaphase I) in the mother. This results in joining of the two chromosomes from the mother. Normal meiosis in father then ensures a single chromosome. Resultantly, three set of chromosomes appear it the offspring)
Answer 9: Choice A (The fact that a range of height of the offsprings is observed suggests that the trait is controlled by polygenic inheritance. Thus, in order to obtain offsprings with maximum deviation in heights, it is very likely that the parents are homozygous for all the alleles, one being tall and other being dwarf. Then only, the different combinations of the allels from both the parents would result in generation of offsprings of variable heights)
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