GN 301 Homework 7: Autosomal and X-linked Pedigrees

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Biology

Genetics

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Last updated 11:22 PM on 2/26/23
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1
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Is the inheritance pattern indicated by the shaded symbols in this pedigree consistent with the inheritance pattern of an autosomal dominant characteristic?
Is the inheritance pattern indicated by the shaded symbols in this pedigree consistent with the inheritance pattern of an autosomal dominant characteristic?
Yes
2
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Is the inheritance pattern indicated by the shaded symbols in this pedigree consistent with the inheritance pattern of an X-linked recessive characteristic?
Is the inheritance pattern indicated by the shaded symbols in this pedigree consistent with the inheritance pattern of an X-linked recessive characteristic?
Yes
3
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Is the inheritance pattern indicated by the shaded symbol in this pedigree consistent with the inheritance pattern of an X-linked recessive characteristic?
Is the inheritance pattern indicated by the shaded symbol in this pedigree consistent with the inheritance pattern of an X-linked recessive characteristic?
No
4
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A man who has an X-linked dominant allele will pass it on to...
All of his daughters
5
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Shaded individuals in this pedigree have an X-linked genetic disorder that causes green toenails. Individuals who are not shaded have the normal clear toenails. Please answer the following questions regarding this pedigree. Assume that a capital "G" represents the dominant allele and that a lower case "g" represents the recessive allele. Which allele is dominant?
Shaded individuals in this pedigree have an X-linked genetic disorder that causes green toenails. Individuals who are not shaded have the normal clear toenails. Please answer the following questions regarding this pedigree. Assume that a capital "G" represents the dominant allele and that a lower case "g" represents the recessive allele.

Which allele is dominant?
Green
6
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The pedigree identity numbers of the identical twins are
III-6 and III-7
7
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The genotype of individual I-4 is
gg
8
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The genotype of individual II-6 is
GY
9
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What is the probability that the next child from the marriage of II-2 x II-3 will have be a son with green toenails?
1/4
10
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Supposed individuals III-1 and III-5 marry and have children. What is the probability that their first child will be a daughter with green toenails?
1/2
11
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The shaded individuals in the pedigree below have an X-linked disorder that causes black teeth to be present instead of the normal white teeth. Assume that the capital letter represents the dominant allele. Which tooth color is dominant?
The shaded individuals in the pedigree below have an X-linked disorder that causes black teeth to be present instead of the normal white teeth. Assume that the capital letter represents the dominant allele.

Which tooth color is dominant?
White Teeth
12
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What is the genotype of individual I-1?
BY
13
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What is the genotype of individual I-4?
bb
14
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What is the probability that II-1 is heterozygous?
1/2
15
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What is the probability that the next child from the union of II-3 x II-4 will be a daughter with black teeth?
1/4
16
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Is the inheritance pattern indicated by the shaded symbols in this pedigree consistent with the inheritance pattern of an X-linked dominant characteristic?
Is the inheritance pattern indicated by the shaded symbols in this pedigree consistent with the inheritance pattern of an X-linked dominant characteristic?
Yes
17
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Is the inheritance pattern indicated by the shaded symbols in this pedigree consistent with the inheritance pattern of a Y-linked characteristic?
Is the inheritance pattern indicated by the shaded symbols in this pedigree consistent with the inheritance pattern of a Y-linked characteristic?
No
18
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Is the inheritance pattern indicated by the shaded symbols in this pedigree consistent with the inheritance pattern of an X-linked recessive characteristic?
Is the inheritance pattern indicated by the shaded symbols in this pedigree consistent with the inheritance pattern of an X-linked recessive characteristic?
No