Instructions: Solve all problems. Credit will not be given for must show the wor
ID: 211971 • Letter: I
Question
Instructions: Solve all problems. Credit will not be given for must show the work you did to solve each problem in order to receive any points for the a simple answer. You answer. 1. The genetic map for a particular region (interval genes a through ) of a human chromosome is: In a man heterozygous for all six genes in the region (a-f), what fraction of his sperm would be recombinant in the a-finterval? en A female rat from a true-breeding wild-type strain was mated with a male rat with red eyes (re) and white body (wh). The Fi rats were wild-type for both traits. When the F were interbred, the F2 rats were distributed as follows: 2. 200 91 all wild t wild type red white red,white Females Males 89 Determine if the genes re and wh are linked?Explanation / Answer
2. Female (RRWW) X Male (rrww)
RrWw ....................................................F1 (Shows dominant character)
Female (RrWw) X Male (RrWw)
Females
All wild type
200
Males
Wild type
91
Red
11
White
9
Red, White
89
........................................ F2
Here re and wh are not linked because in dihybrid cross crossing over occurs. As a result gamets are produced by recombination. So recessive allele do not linked together.
Females
All wild type
200
Males
Wild type
91
Red
11
White
9
Red, White
89