Two recessive traits in mice are droopy ears and flaky tails. A true-breeding mouse with norma ears (De) and a flakey tail (ft) was crossed to a true-breeding mouse with droopy ears (de) and normal tail (Ft). The F1 offspring were then crossed to mice with droopy ears and flaky tails. This cross produced the following 100 offspring... 4 droopy ears, flaky tail 2 normal ears, normal tail 46 normal ears, flaky tail 48 droopy ears, normal tail 1) Looking at the offspring, do you believe the genes are linked or unlinked? Support your answer. 2) What is the genotype of the P1 generation organisms? 3) What is the genotype of the F1 generation?

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A:

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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.