A poultry grower has 2 breeds of chicken, averaging 9 and 5 lbs. in weight. The F1 of the cross between is quite uniform, averaging 7 lbs. Of the F2 progeny, 0.4% is as heavy as either parent. a. How much does each effective allele contribute to weight? b. What is the number of polygenes pairs involved in these crosses? c. If only those with an average weight of 6-8 lbs. are marketable, what percentage of the offspring will yield profit for the grower?

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A: INTRODUCTION Answer of question 1&2 is given below.

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Inheritance and Mendelian Genetics

Inheritance means the passing of traits to offspring from parents. These traits could be passed either through asexual reproduction or sexual reproduction. The offspring receives the genetic material from the parents. Mendelian inheritance is a certain biological inheritance that follows the rules and principles laid down by Gregor Mendel in 1865. The initial hypothesis was considered wrong, but other inheritance theories modified the concept of inheritance and thus genetics.