Exam 10: Patterns of Inheritance

A) 1
B) 2
C) 4
D) 8
E) 16

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A) EW, Ew, eW, and ew
B) EW, EE, eW, and ww
C) WW, Ew, EW, and ew
D) EE, WW, ee, and ww
E) EW, Ew, ee and ww

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A) always assort independently.
B) undergo crossing over of sister chromatids at a high rate.
C) are found on homologous chromosomes.
D) never cross over during prophase I.
E) tend to be close together on a single chromosome.

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A) Females can be heterozygous for sex-linked traits.
B) All traits on the sex chromosomes are associated with sexual development.
C) Males are heterozygous for the SRY gene.
D) The X and Y chromosomes are homologous.
E) Men pass their X-linked traits to their sons.

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A) map units
B) gap distance
C) dominant distance
D) gene locus

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A) the genetics will determine it 100%
B) the environment will determine it 100%
C) both the genetics and environment will determine the coat color
D) neither the environment or genes will play a role in determining coat color

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A) AAGg
B) freckles
C) AA
D) Ag
E) Gg

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A) a multifactorial trait
B) polygenic inheritance
C) pleiotropy
D) codominance
E) incomplete dominance

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A) The plants were easy to grow.
B) Pea plants can either cross-pollinate or self-pollinate.
C) There was only one variety of pea available to Mendel.
D) The plants had several traits that were easily identified.
E) Most of the traits studied had no intermediate stage.

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A) physical expression of a trait - phenotype
B) allele that masks the expression of an alternate allele - dominant
C) identical alleles - heterozygous
D) allele whose expression can be masked by an alternate allele - recessive
E) the specific alleles that an individual has - genotype

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A) codominant
B) X-linked
C) autosomal
D) dominant
E) dihybrid

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A) True because according to the laws of probability, at least one of the offspring should have been an albino.
B) True because 50% of all offspring produced must be albino.
C) False because for each offspring there is a 50% chance that it will have normal pigmentation.
D) False because a heterozygous male will only pass the dominant allele to its offspring.
E) True because if at least one parent is homozygous recessive, at least one of their offspring must also show the recessive trait.

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A) Her mother must be colorblind.
B) Both her parents must be colorblind.
C) Both her parents are carriers of the recessive allele.
D) Her father must be colorblind.
E) Women cannot exhibit red-green colorblindness because they have two X chromosomes.

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A) 1, 2, and 3
B) 1 and 2
C) 1, 3, and 4
D) 1, 2, 3, 4, and 5
E) 1, 3, 4, and 5

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A) express the dominant trait.
B) express the recessive trait.
C) exhibit an intermediate phenotype.
D) express both alleles.
E) exhibit an intermediate genotype.

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A) the numbers of individuals with each version of a trait.
B) all possible combinations of gametes based on a cross between the two parents.
C) an exact ratio that must always occur when the same parents have 4 offspring.
D) examples of some of the offspring that can arise from a one-trait cross.
E) the gametes from one parent.

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A) the two genes in question being linked on the same chromosome
B) a spontaneous mutation within the offspring
C) pure chance
D) an innacurate prediction for the 25%: 25%: 25%: 25% ratio
E) the two genes being on separate chromosomes

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