Genetics and Heredity

Front

What is a Punnett square?

Back

A graph used to predict the possible genotypes of offspring in a given cross.

Front

If green is dominant over purple, what is the genotype for an individual with purple flowers?

Back

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Front

Who is Gregor Mendel?

Back

An Austrian Monk from the mid 1800s who contributed to the study of Genetics.

Front

In humans, having freckles (F) is dominant to not having freckles (f). What is the percent chance that a married couple with no freckles will give birth to a child who has freckles?

Back

0%.

Front

Which is a true statement about the dominance of traits?

Back

Brown is dominant.

Front

What is the definition of genotype?

Back

The genetic constitution of an individual, represented by alleles.

Front

What is the definition of phenotype?

Back

The observable physical or biochemical characteristics of an organism, determined by both genetic makeup and environmental influences.

Front

What does it mean for a trait to be dominant?

Back

A dominant trait is one that will express itself in the phenotype even if only one allele is present.

Front

What does it mean for a trait to be recessive?

Back

A recessive trait is one that will only express itself in the phenotype if two copies of the allele are present.

Front

What is the purpose of a test cross?

Back

To determine the genotype of an individual showing a dominant phenotype by crossing it with a homozygous recessive individual.