Heredity review

Front

What is incomplete dominance in genetics?

Back

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

Front

What is a recessive allele?

Back

A recessive allele is a variant of a gene that can only be expressed phenotypically when two copies are present, one inherited from each parent.

Front

What does the genotype 'Yy' represent?

Back

The genotype 'Yy' represents a heterozygous condition, where one allele is dominant (Y) and the other is recessive (y).

Front

How do you determine the phenotype ratio from a genetic cross?

Back

To determine the phenotype ratio, you can use a Punnett square to visualize the possible combinations of alleles from the parents.

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 the phenotype of a plant with genotype 'TT'?

Back

The phenotype of a plant with genotype 'TT' is tall, as 'T' is the dominant allele for height.

Front

In a pedigree chart, what does a filled circle represent?

Back

A filled circle in a pedigree chart represents a female who expresses the trait being studied.

Front

What is the significance of a Punnett square?

Back

A Punnett square is a tool used to predict the genotypes and phenotypes of offspring from a genetic cross.

Front

What is the difference between homozygous and heterozygous genotypes?

Back

Homozygous genotypes have two identical alleles for a trait, while heterozygous genotypes have two different alleles.

Front

What is the expected phenotypic ratio of a monohybrid cross?

Back

The expected phenotypic ratio of a monohybrid cross between two heterozygous parents is 3:1.