0 Required information Pigeon wing pattern dominance series root In a population

Question

0 Required information Pigeon wing pattern dominance series root In a population of pigeons, four different wing patterns exist: Bar, Barless, T-check, and Check. To understand the inheritance of wing pattern, you cross six pairs of pigeons with each other and obtain these results: ross # rent 1 phe rent s) Barless ar ar check check check check heck check heck heck heck all Check 3/4 T-check: 1/4 Bar T-check: 1/2 Check check -check heck rless Pigeon wing pattern dominance series QuestionC The parents in Cross 2 are true-breeding. If the Barless progeny of Cross 1 are mated with the Check progeny of Cross 2, what percentage of the offspring are expected to have a wing pattern that is different from either parent (not Barless and not Check)? Multiple Choice

Explanation / Answer

In cross 1 since 1/4 progeny is barless and 3/4 are bar it means that both the parents are heterozygous and the 1/4 progeny which is barless carries both the recessive alleles. In cross 2 all the progeny is checked it means check is dominant over bar. now assume BC to be check progeny and bb be barless progeny.

now BC * bb

Bb Bb bC bC , these are the progeny

hence 50 percent are not similar to parents

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