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yawa3891 [41]
3 years ago
9

If an organism is homozygous for a particular trait, the organism A. has extra alleles on both chromosomes in a chromosome pair.

B. has the same allele on both chromosomes in a chromosome pair. C. is missing alleles on the chromosomes in a chromosome pair. D. has different alleles on the chromosomes in a chromosome pair.

Biology
1 answer:
inysia [295]3 years ago
7 0

<em>B. Has the same allele on both chromosomes in a chromosome pair. </em>

<u>Here is why:</u>

Homozygous means the same, while heterozygous means different. If both of the same alleles are on both chromosomes, then it will be a homozygous.

There can be two types of homozygous alleles.

~

<em>Homozygous Dominant</em>: BB

<em>Homozygous Recessive</em>: bb

<u>Notice in both of these they were the same alleles.</u>

~

<em>Heterozygous</em>: Bb

<u>Notice how both are different alleles.</u>

~

Below I have attached a diagram of a Punnett square I have made.

On the left is a homozygous recessive allele pair.

On the top is a heterozygous allele pair.

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