Genetics and Heredity

Front

What is a recessive trait?

Back

A trait that reappears in the second generation after disappearing in the first generation when parents with different traits are bred.

Front

What is Mendel's Law of Dominance?

Back

The law stating that some alleles will mask others, determining the expression of traits.

Front

Who discovered the idea that dominant and recessive genes are passed from parent to offspring?

Back

Gregor Mendel.

Front

How many alleles are in the genotype for a simple Mendelian trait?

Back

2.

Front

What are the two generations after the P generation called?

Back

F1 generation and F2 generation.

Front

What is a dominant trait?

Back

A trait that is expressed in the phenotype even when only one allele is present.

Front

What is an allele?

Back

A variant form of a gene that can produce different 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 the phenotype?

Back

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