CA5

If a person has brown hair with a genotype of Bb, where big B is brown hair and little b is blond hair, which is the dominant gene?

• Neither

• Blonde

• B

• b

An organism that has two identical genes for a trait is said to be

• Hybrid for the trait

• Homozygous for the trait

• Heterozygous for the trait

• Heterozygous for the trait

What are the possible genotypes of the offspring in this punnett square?

• AA and aa

• Aa and Aa

• aa and AA

• aa and Aa

When the genotype consists of a dominant and a recessive allele, the phenotype will be like the ____________ allele.

• dominant

• both

• recessive

• neither

A cross between two brown eyed parents is shown above. Which statement BEST explains why blue eyes appear only in 25% of offspring?

• It is an acquired trait

• It is an recessive trait

• It is a dominant trait

• It is a mutated trait

If the trait is recessive, what is the probability that M will be heterozygous if only ONE parent is a carrier

• 100

• 75

• 50

• 25

Phenotype refers to the ______________ of an individual.

• Genetic Makeup

• Dominant Alleles

• Recessive Alleles

• Expressed Traits

An allele is a

• A heterozygous genotype

• One of several variations of a gene

• Another word for gene

• A homozygous gene

Draw a punnett square to answer this question.

One flower is heterozygous red (Rr) and it is crossed with a homozygous white (rr) plant. Use a Punnett square to determine the probability of one of their offspring having a white color.

• 100%

• 75%

• 50%

• 25%

Draw a punnett square to answer this question:

One flower is heterozygous red (Rr) and it is crossed with a homozygous white (rr) plant. Use a Punnett square to determine the probability of one of their offspring having a red color.

• 100%

• 75%

• 50%

• 25%