TEST_8th-Ch 2:2 -Understanding Inheritance

Front

What does homozygous mean?

Back

The two alleles in a genotype are the same.

Front

What is polygenic inheritance?

Back

Polygenic inheritance occurs when multiple genes determine the phenotype of a trait.

Front

What percentage of offspring would be homozygous recessive if a homozygous dominant organism mates with a heterozygous organism?

Back

0 percent would be homozygous recessive.

Front

What percentage of offspring will be heterozygous when crossing a homozygous tall plant with a homozygous short plant?

Back

100%.

Front

Do sexually reproduced organisms inherit a gene for each trait from each parent?

Back

True.

Front

What is the definition of a genotype?

Back

A genotype is the genetic makeup of an organism, represented by alleles.

Front

What is a phenotype?

Back

A phenotype is the observable physical or biochemical characteristics of an organism.

Front

What are alleles?

Back

Alleles are different forms of a gene that can exist at a specific locus.

Front

What does heterozygous mean?

Back

The two alleles in a genotype are different.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even when only one copy is present; recessive alleles require two copies to express their trait.