AP Biology Genetics

Red x white = pink

• codominance
• multiple alleles
• incomplete dominance
• epistasis

Suppose that in sheep, a dominant allele (B) produces black hair and a recessive allele (b) produces white hair. If you saw a black sheep, you would be able to identify ...

• its phenotype for hair color

• its genotype for hair color

• the genotype of only one of its parents

• the phenotype of both of its parents

One of the main reasons genes assort independently of one another is that

• they produce unrelated traits

• they produce related traits

• they are on the same chromosome

• they are on different chromosomes.

A single gene has 3 or more alternative forms. These are called

• heterozygotes

• alleles

• epistatic

• polygenic

In mice, the homozygous mice are black and white. The heterozygous mice are gray. What pattern of inheritance is expressed in fur color in mice?

• complete dominance and recessiveness
• co-dominance
• incomplete dominance
• pleiotropy

Tags

NGSS.HS-LS3-1

If the parents of a cross are AaBcCc x aaBBcc. What is the probability of an offspring that is homozygous recessive for all 3 traits?

• 1/64
• 1/32
• 1/8
• O

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

In humans, if a non-disjunction event (homologous pairs fail to separate in Meiosis I) leads to an individual that is XXY, they would

• be female because they have 2 X chromosomes

• be male because they have a Y chromosome

• not survive

• have both male and female characteristics

If a female was a carrier for sex-linked color blindness, what percentage of her male children would potentially also be color blind?

• 0%

• 25%

• 50%

• 100%

Chromosomes that do NOT play a role in determining the sex of an individual are called

• sex chromosoems
• X and Y
• autosomes
• A and B are correct

In a sex-linked inheritance pedigree you would expect to see

• more affected females
• all carrier males
• more affected males
• an equal number of affected males and females

Tags

NGSS.HS-LS3-3