Punnett Square Practice

Front

What does heterozygous mean?

Back

Heterozygous refers to having two different alleles for a particular gene.

Front

What is the definition of homozygous dominant?

Back

Homozygous dominant means having two identical dominant alleles for a trait, such as TT.

Front

What is the probability of a child having no freckles if one parent is heterozygous (Ff) and the other is recessive (ff)?

Back

50% chance of having no freckles.

Front

What is the phenotype of offspring from a homozygous dominant (RR) and a homozygous recessive (rr) guinea pig?

Back

100% rough coat.

Front

What does phenotype refer to?

Back

Phenotype refers to the observable physical characteristics of an organism.

Front

What does genotype refer to?

Back

Genotype refers to the genetic makeup of an organism, including the alleles it possesses.

Front

What is a Punnett Square used for?

Back

A Punnett Square is used to predict the genetic outcomes of a cross between two organisms.

Front

If a plant has the genotype Aa, what are the possible gametes it can produce?

Back

The possible gametes are A and a.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even if only one copy is present, while recessive alleles require two copies to express their trait.

Front

In a cross between two heterozygous parents (Tt x Tt), what is the expected genotypic ratio of the offspring?

Back

1 TT : 2 Tt : 1 tt.