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WorksheetsMastery Check 3.2.2
Total questions: 14
Worksheet time: 1hrs 10mins
A man who has a genotype, Aa, marries a woman with the genotype, AA. What is the probability that their offspring will have the genotype, Aa?
25%
50%
75%
100%
Which pattern of heredity determines human hair color and skin color?
multiple alleles
polygenic inheritance
incomplete dominance
sex-linked inheritance
In humans, tongue rolling is caused by a dominant autosomal allele. This pedigree shows three generations of a family and their ability to roll their tongues. Which phenotype best describes individual III-7?
homozygous tongue rolling male
heterozygous tongue rolling male
homozygous tongue rolling female
heterozygous tongue rolling female
A red flower (RR) and a white flower (R'R') are crossed and produce pink flower offspring (RR'). What is the expected outcome for the offspring that result from the cross between two pink flower plants?
0% red, 100% pink, 0% white
25% red, 50% pink, 25% white
25% red, 25% pink, 50% white
50% red, 25% pink, 25% white
A mother is heterozygous for blood type A and a father has blood type AB. What is the probability that their offspring would have type A blood?
0%
25%
50%
75%
The karyotype diagram below represents a human female with the genetic disorder known as Turner syndrome. Chromosomal analysis of this karyotype reveals the mutation is a result of
a missing X chromosome.
a missing Y chromosome.
an extra chromosome on chromosome 9.
a deletion of a section of chromosome 21.
A woman is a carrier for color blindness, a sex–linked trait. If she marries a man who is not color–blind, what is the probability that one of their sons will inherit the trait?
0%
25%
50%
100%
In skunks, a white stripe down the back is dominant when compared to solid black skunks. If heterozygous striped skunks mated, which percentage of their offspring would be expected to have no stripes?
0%
25%
50%
100%
When a red bull (RR) is bred with a white cow (WW), a roan calf (RW) with red and white fur is sometimes produced. If a roan bull (RW) is bred with a roan cow (RW), what is the most likely outcome of the offspring?
1 red : 1 white : 2 roan
0 red : 1 white : 3 roan
2 red : 2 white : 0 roan
0 red : 0 white : 4 roan
Shaded individuals in this pedigree express a particular trait. Based on this pedigree, what is the most likely pattern of inheritance of the trait?
sex-linked dominant
sex-linked recessive
autosomal dominant
autosomal recessive
Four children in a family have four different blood types. If the father has type A blood, which blood genotype best represents the mother?
IBIB
IBi
IAIB
IAi
A man and his wife both have widow’s peaks. Their baby has a continuous hairline. Which best explains how this could happen?
Both parents have heterozygous genotypes.
Both parents have homozygous dominant genotypes.
One parent is homozygous dominant, and the other is heterozygous.
One parent is homozygous dominant, and the other is homozygous recessive.
Why are sex-linked recessive traits more common in males than females?
Males have two X chromosomes, so they have to inherit two copies of the recessive allele to express the trait.
Females have two X chromosomes, and sex-linked recessive traits are expressed by inheriting only one recessive allele.
Males have only one X chromosome, so they will inherit the trait with only one copy of the recessive allele.
Females have only one X chromosome, and sex-linked recessive traits are expressed by inheriting two copies of the recessive allele.
Which explains why a person would possess only two of the three possible alleles for human blood type?
A person inherits one allele from each parent.
A person inherits a mutation that limits the number of alleles.
A person inherits all three alleles, and the weakest one is destroyed.
A person inherits all three, but two are combined when DNA is transcribed.
