Question

In: Biology

2) You are following four traits (a, b, c, and d). The following crosses were performed....

2) You are following four traits (a, b, c, and d). The following crosses were performed.

Cross 1: a b female x c d male

F1 progeny: all wild type

Cross 2: F1 female x F1 male

F2 progeny:     1600 wild type

(total 6400)     800 d

400 b d

800 a

400 a b

1200 c

400 dc

800 b

A. Describe the inheritance pattern for each trait.   Be as complete as possible.

B. Which, if any, genes are linked? Can you provide a map distance between the genes?

Solutions

Expert Solution

Recombination Frequency (R.F.) between the genes c-d is minimum means they are linked, as they are closely located on a chromosome. If the value of R.F. comes less than 17% it means genes are linked.

  • R.F. between a-b is 37.5% this value is greater than 17%, means these genes are located on two separate chromosomes means these genes are located on two separate chromosomes means they will be segregated independently during gamete formation.
  • Mode if inheritance of the gene b, c will be similar to the genes a-b, as described above because recombination frequency of them is greater than 17%.
  • Genes c-d are linked because their recombination frequency is minimum, thus they will not be segregated independently as they are closely located.

the explanation is given in below:

gladiator answered 2 years ago
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