Punnett Square.2

Front

What is an allele that is masked when a dominant allele is present?

Back

Recessive Allele

Front

Can two tall pea plants have a short offspring?

Back

Yes, both parents would have to be heterozygous (Tt).

Front

What is the percentage chance that the offspring will display the hidden recessive trait if both parents are heterozygous?

Back

25%.

Front

What do you call an organism that has two different alleles for a trait?

Back

Heterozygous.

Front

What is the genotype for a yellow plant if G = green and g = yellow?

Back

gg.

Front

What is a dominant allele?

Back

An allele that masks the effect of a recessive allele.

Front

What is a homozygous genotype?

Back

An organism with two identical alleles for a trait (e.g., TT or tt).

Front

What does phenotype refer to?

Back

The observable characteristics of an organism.

Front

What does genotype refer to?

Back

The genetic makeup of an organism.

Front

If a plant has the genotype Tt, what is its phenotype?

Back

Tall, because T (tall) is dominant.