1. if a pea plant’s alleles for height are tt, what is true of its parents?

a.) both parents are tall.
b.) both parents are short.
c.) both parents contributed a recessive allele.
d.) both parents contributed a dominant allele.

2. a tall plant (tt) is crossed with a short plant (tt). if the tall f1 pea plants are allowed to self-pollinate,

a.) the offspring will be of medium height.
b.) all of the offspring will be tall.
c.) all of the offspring will be short.
d.) the offspring can be tall or short.

1. C) Both parents contributed a recessive allele
The offspring is homozygous for the recessive allele, which means it has two copies of it. Because each parent contributes one copy of the gene, this means that both parents contributed the recessive allele.

2. D) The offspring can be tall or short

The first cross between TT and tt will yield an F1 generation with the genotype Tt. When this generation is self-pollinated, the cross may result in the following genotypes:
TT, Tt, tt
Which means that the offspring can be tall or short.

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