Genetics Review Flashcard PT 2

Front

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

Back

homozygous

Front

Which of the following represents a homozygous recessive genotype?

Back

aa

Front

What is the term for the observable traits or characteristics of an organism?

Back

phenotype

Front

What is the genotype for a homozygous recessive organism?

Back

aa

Front

What is the PHENOTYPE ratio for a cross between a heterozygous and a homozygous recessive parent?

Back

2:2

Front

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

Back

heterozygous

Front

What is the term for the genetic makeup of an organism?

Back

genotype

Front

What is the term for a gene that is expressed only in the homozygous condition?

Back

recessive

Front

What is the term for a gene that is expressed in both homozygous and heterozygous conditions?

Back

dominant

Front

In a Punnett square, what does each box represent?

Back

A possible genotype of the offspring.