AP Biology 337 Genetic Review

What are the variations of a gene called?

• dominant genes
• progeny
• alleles
• homologues

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The appearance resulting from a given gene combination is referred to as the

• genotype
• phenotype
• phototype
• stereotype

All alleles having more than one effect on an individual's phenotype is called

• a polygene
• co-dominance
• pleiotropy
• synteny

Unlike Mendel's experiments, when a very tall person and a very short person mate, the children are variable in height. Why is one trait (tall or short) not dominant over the other?

• the gene for height in humans has incomplete dominance
• the gene for height has multiple co-dominant alleles
• height in not controlled by genes in humans
• human height is controlled by multiple genes

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

A gene for a particular trait is only expressed in the presence of another gene of the same kind is called a(n)

• dominant gene
• co-dominant gene
• incompletely dominant gene
• recessive gene

An allele that is present but unexpressed is

• recessive
• dominant
• redundant
• epistatic

The observable outward manifestation of the genes of an individual is referred to as its

• blueprint
• genotype
• phenotype
• genetic map

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NGSS.HS-LS4-4

NGSS.HS-LS4-5

Let P = purple flowers and p = white and T = tall and t = dwarf. What would the phenotype of a plant with the genotype PpTt be?

• purple flowers, tall
• purple flowers, dwarf
• white flowers, tall
• white flowers, dwarf

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