Homework4Solution

Homework4Solution - Biology 214/414 Homework #4 Due 9-18-09...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Biology 214/414 Homework #4 Due 9-18-09 Consider involving three genes in peas; each of the three has two alleles which, in all three cases, display simple dominance-recessiveness relationships. The three dominant alleles are A, B, and D and the corresponding recessive alleles are a, b, d. 1. A/a and B/b are not linked. What are the percentages of AB, Ab, aB, and ab gametes expected from a pea plant that is AaBb? 2. A/a and D/d are linked and are 7 map units apart. What are the percentages of AD, Ad, aD, and ad gametes expected from a pea plant that is AaDd? 3. What percentage of offspring from a cross of AaDd X aadd plants is expected to be Aadd? 1. If A/a and B/b are not linked (that is they are on separate pairs of homologous chromosomes), then this is the simple situation that we saw with the dihybrid cross in Mendel’s experiments with the peas when he was following pea color and pea shape at the same time. Thus we expect 4 gamete types (AB, aB, Ab, and ab), each present an equal fraction of the time (i.e., 25
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

Homework4Solution - Biology 214/414 Homework #4 Due 9-18-09...

This preview shows document pages 1 - 2. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online