Beginning of Heredity Flashcard

Front

What is a gene?

Back

A unit of genetic material that determines a trait.

Front

What are the possible genotypes for a child of two brown-eyed parents?

Back

BB, Bb, bb

Front

What is a dominant allele?

Back

A trait that is always shown, represented by a capital letter.

Front

Define a dominant trait.

Back

A trait that is ALWAYS present and causes the other traits to disappear.

Front

What are alleles?

Back

Different versions or forms of the same gene.

Front

What is the difference between genotype and phenotype?

Back

Genotype refers to the genetic makeup of an organism, while phenotype refers to the observable traits.

Front

What does homozygous mean?

Back

Having two identical alleles for a particular gene.

Front

What does heterozygous mean?

Back

Having two different alleles for a particular gene.

Front

What is a recessive allele?

Back

A trait that is only expressed when two copies are present, represented by a lowercase letter.

Front

How can you determine the probability of a trait being expressed in offspring?

Back

By using a Punnett square to predict the genotypes of the offspring.