EXAM Genetics

For what is Gregor Mendel most well known?

• his experiments with pea plants which showed that certain traits followed predictable patterns of inheritance

• his research on the human genome project

• his research with Charles Darwin studying evolution and inheritance

• the creation of the Punnett square, a tool used by biologists to predict possible genotypes of offspring

Chickens express three variations for feather color; white, black, and black and white speckled. The genotypes are: WW = white ; BB = black; WB or BW = black and white speckled . What can you conclude about these traits?

• Black and white feather color are codominant.

• Black feather color is dominant and white feather color is recessive.

• White feather color is dominant and black feather color is recessive.

• Black and white feather color exhibits incomplete dominance.

The Punnett square shows a cross between a horse with a pure black coat (CC) and a horse with a pure chestnut coat (cc). The offspring all exhibit black fur. What can be concluded about the trait of a pure chestnut coat?

• It is dominant.

• It is recessive.

• It is neither dominant nor recessive.

• It is a mutation.

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In pea plants, green is dominant to yellow. If a yellow pea pod and a green pea pod are crossed, assuming both are homozygous, what genotype should appear in the empty square?

• GG

• gg

• Gg

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When two pea plants with Tt genotypes are cross-bred, how many short (tt) plants will there most likely be in the new generation

• 1 out of 4

• 1 out of 2

• 1 out of 6

• 1 out of 8

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Black fur is dominant (B) over white fur (b).  Find the probability of heterozygous offspring using the following genotype of these parents.
Bb + bb

• 0%
• 25%
• 50%
• 100%

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Gregor Mendel is often called ....

• The father of heredity.
• The father of genetics.
• The king of peas
• The father of punnett squares.

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NGSS.HS-LS3-1

What would be the results of a genetic cross between the following parents?  TT + Tt

• Tt, tt, tt, tt
• TT, TT, TT, Tt
• Tt, Tt, Tt, TT
• TT, TT, Tt, Tt

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An organism's appearance is known as its

• heredity
• phenotype
• genotype
• pedigree

having two of the same genes for the trait (sometimes called purebred).

• homozygous
• hetrozygous
• protein
• chromosome

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