Genetics Review

Front

What is the genetic makeup of an organism?

Back

Genotype

Front

What do the letters nn represent in genetics?

Back

Homozygous genes

Front

What does it mean if an offspring has the recessive form of a trait?

Back

One parent has 2 recessive alleles and the other parent has 1 dominant and 1 recessive allele.

Front

What is the term for the physical expression of a trait?

Back

Phenotype

Front

What is a Punnett square used for?

Back

To predict the genetic outcomes of a cross between two organisms.

Front

What does homozygous dominant mean?

Back

An organism has two identical dominant alleles for a trait.

Front

What does heterozygous mean?

Back

An organism has two different alleles for a trait.

Front

If 'G' represents green skin and 'g' represents brown skin, what is the chance of baby frogs being homozygous dominant?

Back

50%.

Front

What is the difference between dominant and recessive alleles?

Back

Dominant alleles express their trait even if only one copy is present, while recessive alleles require two copies to express their trait.

Front

What is an allele?

Back

An allele is a variant form of a gene.