Punnett Squares

If AA, Aa, aa are the possible genotypes of the offspring in a cross, then what are the parent genotypes?

• Aa and aa

• AA and Aa

• Aa and Aa

• AA and AA

Which of the following is true about Punnett squares?

• Gametes are unimportant for a Punnett Square

• They cannot predict the possible phenotypes of the offspring

• They can show the possible genetic combinations in the offspring.

Which of the following must be true about the parent whose genese are aa? KEY: A= straight hair and a=curly hair

• The parent's genes are dominant

• the parent has straight hair

• the parent is capable of having AA offspring

• the parent has curly hair

When two heterozygous parents are crossed (Aa X Aa), what persent of the offspring will have a sominant phenotype?

• 100%

• 25%

• 75%

• 50%

What genotypes are observed when you cross a Dd parent with another Dd parent?

• 75% DD and 25% dd

• 100% DD

• 50% DD and 50% dd

• 25% DD, 50% Dd, 25% dd

A _________ square is a chart that allows you to determine the probability of different genotypes in the offspring of two parents.

If a Pp plant is crossed with another Pp plant, what is (are) the expected genotype(s) in the offspring?

• 25% PP, 50% Pp, 25% pp

• 100% Pp

• 75% Pp, 25% pp

• 50% PP, 50% pp

A __________ square is a diagram that helps predict the probable inheritance of alleles in different crosses.

An allele that produces its characteristic phenotype only when its paired allele is identical is known as a ____________.

• dominant allele

• gene

• recessive allele

A genetic cross between parents that differ in tow characteristics is called a ____________.

• dihybrid cross

• phenotype cross

• monohybrid cross