Mendelian Genetics Practice

What did Mendel call the two kinds of traits exhibited by the pea plants (one coming from the father, one from the mother)?

• Genesis

• Elective traits

• Alleles

• Quadrants

If a pea plant were homozygous recessive for height, how would its alleles be represented?

• TT

• Tt

• tt

• tT

Which of the following best describes a GENOTYPE?

• The allele/genetic makeup of an organism.

• The physical expression of a trait.

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The letters on the TOP AND SIDE of a punnett square represent ______________.

• The combination of alleles in offspring.

• The possible alleles given by the parents following meiosis.

• The genotype and phenotype of offspring.

• The results of genetic mutations in offspring.

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NGSS.HS-LS3-1

Black hair color is dominant to white hair color in mice. Determine the phenotypic ratio for the offpring of a heterozygous black mouse and a white mouse.

• 4 Black: 0 White

• 3 Black: 1 White

• 2 Black: 2 White

• 0 Black: 4 White

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NGSS.HS-LS3-1

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Having two of the same alleles for a trait (sometimes called purebred) is known as ____________.

• homozygous

• hetrozygous

• protein

• chromosome

Tags

NGSS.HS-LS3-1

What is the name for a cross that examines the inheritance of two traits?

• incomplete dominance

• codominance

• monohybrid

• dihybrid

The ability to taste the chemical PTC is due to a single gene in humans. Tasters carry the dominant allele T and nontasters carry the recessive allele t. Imagine two heterozygotes have a large family. The phenotypic ratio for tasters:nontasters in their children is __________.

• 9:3:3:1

• 1:1

• 3:1

• 1:2:1

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NGSS.HS-LS3-1

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What term refers to mixture or blending of two traits?

• Codominance

• Non-dominance

• Complete dominance

• Incomplete dominance

What is the predicted percentage of homozygous recessive offspring in this cross?

• 0%

• 25%

• 50%

• 75%

Tags

NGSS.HS-LS3-1

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