A monohybrid cross is a mating where alleles of just one gene are tracked in the offspring.  A test cross is a mating in which two parents (P generation) are crossed to give F1 (first filial generation) offspring, and then two F1 parents are crossed to give F2 (second filial generation) offspring.  By tracking offspring through two generations, a test cross can reveal patterns of inheritance for particular genes. In a cross between a black and a white guinea pig, all members of the F1 generation are black. The F2 generation is made of ¾ black and ¼ white guinea pigs.  Diagram this cross, and list the genotypes and phenotypes for each 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.