Punnett Square, Incomplete & Codominance 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 do the letters T and t represent in genetics?

Back

T represents the dominant allele for tallness, while t represents the recessive allele for shortness.

Front

What is codominance?

Back

Codominance is a genetic scenario where both alleles in a heterozygote are fully expressed, resulting in offspring with a phenotype that is neither dominant nor recessive.

Front

What is incomplete dominance?

Back

Incomplete dominance is a genetic situation where one allele does not completely dominate another, resulting in a phenotype that is a blend of the two.

Front

What are alleles?

Back

Alleles are different forms of a gene that can exist at a specific locus on a chromosome.

Front

If a red radish (RR) is crossed with a white radish (WW), what is the phenotype of the offspring?

Back

All offspring will be purple (RW) due to incomplete dominance.

Front

What is the probability of getting a white fur offspring if B = brown fur and b = white fur in a Punnett Square?

Back

The probability of getting a white fur offspring (bb) is 50%.

Front

What does a genotype of Tt indicate?

Back

A genotype of Tt indicates a heterozygous individual with one dominant allele (T) and one recessive allele (t).

Front

What is the phenotypic ratio of a monohybrid cross?

Back

The phenotypic ratio of a monohybrid cross between two heterozygous parents (Tt x Tt) is 3:1.

Front

What is the genotypic ratio of a monohybrid cross?

Back

The genotypic ratio of a monohybrid cross between two heterozygous parents (Tt x Tt) is 1:2:1.