Genetics Review

Using the Punnett square below, identify the genotypes of the parents to produce approximately 50% homozygous brown-eyed offspring and 50% heterozygous offspring. R=dominant (red eye), r=recessive (brown eye)

• RR X RR

• Rr X Rr

• Rr X rr

• RR X rr

The mathematical chance that something will happen is known as _________________ .

• possibility

• probability

• percentage

• product

In genetics, which allele overpowers the other to express a trait?

• The dominant allele overcomes the recessive allele.

• The recessive allele overcomes the dominant allele.

• Neither the dominant nor recessive alleles overcome one another.

• The allele with the mutation overcomes the other allele.

All new daughter cells that are created through meiosis are __________ from their parent cells.

• clones

• identical

• different

• mutated

According to the diagram below, which of the following is the correct process?

• Mitosis

• Binary Fission

• Cell Recruitment

• Meiosis

In pea plants, the allele for having a round seed shape (R) is dominant to having a wrinkled seed shape (r). A homozygous dominant pea plant for having a round seed shape and a pea plant that is heterozygous are crossed. What are the possible phenotypes of the offspring?

• All offspring will have round seeds.

• Some offspring will have round seeds, and some will have wrinkled seeds.

• All offspring will have wrinkled seeds.

• None of the above.

Using "A" to represent the dominant trait and "a" to represent the recessive trait, what are the genotypes of mom and dad in the F1 generation? Hint: 25% of the offspring is recessive for short wings.

• Mom: AA, Dad: AA

• Mom: Aa, Dad: aa

• Mom: aa, Dad: aa

• Mom: Aa, Dad: Aa

What is an organism’s appearance called?

• Its genotype

• Its phenotype

• Its dominant trait

• Its recessive trait

No freckles (FF, Ff) is dominant to freckles (ff). Give the phenotype for the following alleles: Ff

• homozygous dominant non-freckled

• homozygous recessive freckled

• heterozygous non-freckled

• heterozygous freckled

During the cell cycle, if a cell is damaged and doesn't pass its checkpoints, what will happen?

• It will undergo apoptosis (commits cellular suicide).

• Continue to complete its cell cycle.

• It will begin cell division.

• It will restart the cell cycle and try again.