Bio 107 Mendelian Genetics

Front

Who is known as the 'father of genetics'?

Back

Gregor Mendel

Front

What do we call the result of the genotype (for example, the color of the peas)?

Back

Phenotype

Front

A recessive allele is only expressed when a dominant allele is not present. What is this principle called?

Back

Law of dominance

Front

In pea plants, the trait for tall stems is dominant over the trait for short stems. If two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents?

Back

75%

Front

What is the genotype of a heterozygous individual?

Back

Hh

Front

Define genotype.

Back

The genetic constitution of an individual, represented by alleles.

Front

Define phenotype.

Back

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

Front

What is a dominant allele?

Back

An allele that expresses its trait even in the presence of a recessive allele.

Front

What is a recessive allele?

Back

An allele that only expresses its trait when two copies are present (homozygous condition).

Front

What is the principle of segregation?

Back

The principle stating that during the formation of gametes, the two alleles for a trait separate from each other.