Q40 of 167 Page 193

For his experiments on heredity, Mendel used:

Pea Plants

Mendel selected pea plants because they are easy to raise, they give many offspring per mating; they fertilize on their own and have varieties in genotype and phenotype

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38

When two parents are crossed, the offspring are referred to as :

 39

A cross between two individuals results in a ratio of 9: 3: 3 : 1 for four possible phenotypes of progeny. This is an example of a;

 41

The human animal which has an XY pair of chromosomes is called:

 42

The science of heredity is known as: