Genetics Review

Front

What is a Punnett Square?

Back

A Punnett Square is a diagram used to predict the outcome of a genetic cross by showing the possible combinations of alleles from the parents.

Front

What is the probability of having a recessive trait if both parents are heterozygous?

Back

25%.

Front

What does homozygous mean?

Back

Homozygous means having the same alleles for a particular gene, such as 'tt' or 'TT'.

Front

What does heterozygous mean?

Back

Heterozygous means having different alleles for a particular gene, such as 'Tt'.

Front

What is a dominant trait?

Back

A dominant trait is a characteristic that is expressed when at least one dominant allele is present in the genotype.

Front

What is a recessive trait?

Back

A recessive trait is a characteristic that is only expressed when two recessive alleles are present in the genotype.

Tags

NGSS.HS-LS3-2

Front

What does a capital letter represent in a genotype?

Back

A capital letter represents a dominant allele.

Front

What does a lowercase letter represent in a genotype?

Back

A lowercase letter represents a recessive allele.

Front

What is the genotype for a homozygous recessive individual?

Back

The genotype for a homozygous recessive individual is 'aa'.

Front

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

Back

The phenotype is tall, because 'T' is the dominant allele.

Tags

NGSS.HS-LS1-1