Warm Up 1/11-1/14

In certain breeds of dogs, deafness is due to a recessive allele (d) of a gene and normal hearing is due to the dominant allele (D). What percentage of offspring of a (Dd) dog and a (dd) dog would have NORMAL hearing?

• 25%

• 50%

• 75%

• 100%

In humans, normal pigmentation is due to a dominant allele (C) and albinism to its recessive allele (C). A normal man marries and albino woman. Their first child is albino. What is the likelihood that the couple's second child would be albino?

• 25%

• 50%

• 75%

• 40%

Albinism is an autosomal recessive condition. Which circle graph shows the genotype probability when an albino female mates with a male that is heterozygous for the albinism trait?

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Hawaiian happy face spiders from the island of Maui can have different markings, as shown in the image.

The pattern allele is dominant to the plain allele.

A plain spider is crossed with a homozygous patterned spider.

What percentage of the offspring from this cross are expected to be patterned?

• 0%

• 25%

• 50%

• 100%

A partial Punnett square is shown in the image.

Given the offspring in the Punnett Square, what is the most likely genotype of the parents?

• Both parents are heterozygous.

• Both parents are homozygous dominant.

• One parent is homozygous recessive and the other parent is heterozygous.

• One parent is homozygous dominant and the other parent is heterozygous.

Genotype refers to the ...

• physical expression of the genes
• the possible combination of alleles in a gene
• whether an allele is dominant or recessive
• how an organism will appear

Squidward has light blue skin, and his genotype for this trait is Bb. Would Squidward be considered a purebred or hybrid for light blue skin?

• Purebred
• Hybrid

What is a phenotype

• The genetic make up (code)
• The physical trait

Two heterozygous (Tt) tall pea plants are crossed. Which describes their offspring?

• 50% tall and 50% short
• 75%tall and 25% short
• 100%short

Two brown eyed parents (Bb) have a baby. What is the chance the baby is blue eyed?

• 0 %
• 25%
• 50%
• 75%