Genetics Review AP Biology

Red x white = pink

• codominance
• multiple alleles
• incomplete dominance
• epistasis

In peas, the trait for tall plants is dominant (T) and the trait for short plants is recessive (t).  The trait for yellow seeds is dominant (Y) and the trait for green seeds is recessive (y).
A cross between two plants results in 292 tall, yellow plants and 103 short, green plants.  What are the most likely genotypes of the parents?

• TtYY x Ttyy
• TTYy x TTYy
• TTyy x TTYy
• TtYy x TtYy

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NGSS.HS-LS3-1

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Suppose that in sheep, a dominant allele (B) produce black hair and a recessive allele (b) produce 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

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NGSS.HS-LS3-1

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

• they produce unrelated traits
• they produce related traits
• they are on the same chromosome
• they are on different chromosomes.

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NGSS.HS-LS3-1

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

• heterozygotes
• multiple alleles
• epistatic
• polygenic

A child has type O blood, if mother has type A blood, what would the fathers blood type be

• A,B, or O
• AB or A
• AB or B
• O only

Tags

NGSS.HS-LS3-1

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

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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

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NGSS.HS-LS3-3

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In humans, if a non-disjunction event 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

Tags

NGSS.HS-LS3-1

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

• 0%
• 25%
• 50%
• 100%

Tags

NGSS.HS-LS3-1

NGSS.HS-LS3-3