Genetics Review Flashcard

Front

What is the term for an organism that has two identical alleles for a particular gene?

Back

Homozygous

Front

What is the term for an organism that has two different alleles for a particular gene?

Back

Heterozygous

Front

What is the genotype for a heterozygous organism?

Back

Aa

Front

What are the basic units of heredity that are passed from parents to offspring?

Back

Genes

Front

What is the percentage of female offspring that will be carriers for a recessive disease if one parent is homozygous recessive and the other is heterozygous?

Back

50%

Front

What is the term for a trait that is expressed only when two recessive alleles are present?

Back

Recessive trait

Front

What is the term for a trait that is expressed when at least one dominant allele is present?

Back

Dominant trait

Front

What is the physical expression of a genotype called?

Back

Phenotype

Front

What is the genetic makeup of an organism called?

Back

Genotype

Front

In a pedigree chart, what does a filled circle represent?

Back

Affected female