Genetics: Basics

Front

What is the physical appearance of an organism called?

Back

Phenotype

Front

What is the trait (allele) that is hidden called?

Back

Recessive

Front

What do the letters that represent the different forms of a gene refer to?

Back

Alleles

Front

What is a heterozygote?

Back

An organism with two different alleles for a trait (e.g., Pp).

Front

What is a homozygote?

Back

An organism with two identical alleles for a trait (e.g., PP or pp).

Front

What is a dihybrid cross?

Back

A genetic cross that involves two traits (e.g., AaBb x AaBb).

Front

What is a dominant allele?

Back

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

Front

What is heredity?

Back

The passing of traits from parents to offspring.

Front

What is a gene?

Back

A segment of DNA that codes for a specific trait.

Front

What is a genotype?

Back

The genetic makeup of an organism (e.g., PP, Pp, pp).