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WorksheetsPedigrees and Sex-linked traits
Total questions: 25
Worksheet time: 57mins
On this pedigree, the allele for curly hair is dominant. The couple labeled 2 both have curly hair, but have a daughter who does not have curly hair. Therefore, we can tell from the chart that for the couple labeled 2 -
the male is heterozygous and the female is heterozygous.
the male is homozygous recessive and the female is homozygous dominant.
If this pedigree shows a recessive disorder, what MUST the genotype of individual 4 be?
HH
Hh
hh
In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R X r ?
male with white eyes
female with red eyes
male with red eyes
female with white eyes
In fruit flies, eye color is a sex linked trait. Red (R) is dominant to white (r). What is the sex and eye color of flies with the following genotype: X R Y ?
male with white eyes
female with white eyes
male with red eyes
female with red eyes
Colorblindness is more common in males than in females because......
fathers pass the allele for colorblindness to their sons only
the allele for colorblindness is located on the Y chromosome
the allele for colorblindness is recessive and located on the X chromosome
males who are colorblind have two copies of the allele for colorblindness
Colorblindness is a recessive X-linked disorder.
Which genotype represents a male with normal vision?
XN YN
Xn Yn
XN Y
Xn Y
The woman who is colorblind marries a man with normal vision. What is the probability that their sons will be colorblind?
0%
25%
50%
100%
Which genotype represents a female who is a carrier for hemophilia?
Which genotype represents a male with hemophilia?
__________ are traits (which may be autosomal or sex-linked) affects body parts or functions present in only one gender.
Sex-Linked Traits
Sex-Limited Traits
Sex-Interrupted Traits
Sex-Influenced Traits
Carefully examine this pedigree. Using the letters H/h for the alleles, determine the genotype for individual #8.
HH
Hh
hh
XHY
XhY
Carefully examine this pedigree. Using the letters H/h for the alleles, determine the genotype for individual #21.
HH
Hh
hh
XHY
XhY
Carefully examine this pedigree. Using the letters H/h for the alleles, determine the genotype for individual #2.
HH
Hh
XHXH
XHXh
XhXh
Carefully examine this pedigree. Using the letters H/h for the alleles, determine the genotype for individual #11.
HH
Hh
XHXH
XHXh
XhXh
Carefully examine this pedigree. Using the letters H/h for the alleles, determine the genotype for individual #18.
HH
Hh
XHXH
XHXh
XhXh
What type of inheritance pattern is shown here?
Codominance
Incomplete dominance
Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be black?
25
50
75
100
Incomplete dominance occurs in cats, which allows them to be Black, White, or gray as shown on this Punnett square. What percentage of the offspring will be white?
25
50
0
100
Hemophilia is a recessive x-linked disorder.
Which genotype represents a female with hemophilia?
XHXh
XhXh
XHXH
XhY
In fruit flies, wing shape is a sex-linked trait. Normal wings (N) are dominant to vestigial wings (n). What is the sex and wing shape of flies with the following genotype: XnY?
male with normal wings
female with normal wings
male with vestigial wings
female with vestigial wings
