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WorksheetsBiology Genetics Assessment SB3B Review
Total questions: 20
Worksheet time: 10mins
Jane's mother and father have type B blood. When Jane's blood was tested, she found she had a blood-type of O. What does this suggest of Jane's parents?
Both have a recessive gene for type O blood.
Both are homozygous for type B blood.
One of them has a recessive gene for type O blood.
One of them is homozygous for type B blood.
What will be the outcome if a mother with type A positive blood and a father with type O negative blood produce a child?
There is a 50% chance the child will have type A positive blood, depending on the genotype of the father.
There is either a 100% or 50% chance the child will have type A positive blood, depending on the genotype of the mother.
There is either a 100% or 50% chance the child will have type O negative blood, depending on the genotype of the father.
There is a 50% chance the child will have type O positive blood, depending on the genotype of the mother.
Mr. Ellwood's genotype is Bb (black) and Mrs. Ellwood's genotype bb (blonde). If Mr. and Mrs. Ellwood had four children together, which of the following would likely represent the children's genotypes?
Only 2 of the children would be heterozygous Bb, and 2 of the children would be homozygous bb.
All 4 of the children would be heterozygous Bb.
Only 3 of the children would be heterozygous Bb, and 1 child would be homozygous bb.
All 4 of the children would be homozygous bb.
What will be the outcome if a woman who is XXBb produces a child with a man who is XYBb?
There is a 75% chance that the child will be a female who will have thinning hair.
There is a 50% chance that the child will be a male who will become bald.
There is a 12.5% chance that the child will be a male who will not become bald.
There is a 25% chance that the child will be a female who will not have thinning hair.
What would the genotype look like for the offspring that are homozygous for both recessive traits?
aabb
AaBb
AABB
AABb
In dogs, fur color is a genetic trait. A female dog with black fur and a male dog with black fur have several litters of puppies. The table shows the fur color of the offspring. Which of the following explains the MOST LIKELY pattern of inheritance for fur color in these dogs?
The pattern of inheritance is autosomal, with black fur being recessive. Each parent had two copies of the allele for black fur.
The pattern of inheritance is autosomal, with brown fur being recessive. Only the female parent had a copy of the allele for brown fur.
The pattern of inheritance is autosomal, with black fur being dominant. Each parent had one copy of the allele for black fur.
The pattern of inheritance is autosomal, with brown fur being dominant. Only the female parent had a copy of the allele for brown fur.
If a man with genotype AaBb mates with a woman who is aabb, what is the probability that their child will be heterozygous for both traits?
75%
50%
100%
25%
Which of the following blood type combinations could produce a child with type AB blood?
Type O and Type O
Type A and Type B
Type B and Type O
Type A and Type O
In a certain species, the allele for long fur (L) is dominant over short fur (l). If two heterozygous long-furred animals mate, what percentage of their offspring are expected to have short fur?
0%
75%
25%
50%
If two parents both have genotype Aa for a particular trait, what is the probability that their child will be homozygous recessive for that trait?
75%
0%
50%
25%
Which parental blood type combination could never produce a child with type O blood?
Type A and Type B
Type AB and Type AB
Type O and Type O
Type A and Type O
In a species where the allele for curly hair (C) is dominant over straight hair (c), what is the expected ratio of curly-haired to straight-haired offspring if a heterozygous curly-haired individual mates with a straight-haired individual?
2:1
1:1
3:1
All curly-haired
Which parental genotype combination could produce offspring with all possible blood types (A, B, AB, and O)?
AO x BO
AA x BB
AB x OO
AA x AO
In a species where the allele for tall plants (T) is dominant over short plants (t), what is the expected ratio of tall to short offspring if two heterozygous tall plants are crossed?
2:1
3:1
All tall
1:1
Which of the following parental genotype combinations could produce a child with only type A or type O blood?
BB x AO
AO x AO
AB x AO
AA x OO
If two parents are both heterozygous for a dominant trait (Dd), what is the probability that their child will express the recessive phenotype?
50%
25%
0%
75%
In a species where the allele for white fur (W) is dominant over gray fur (w), what is the expected ratio of white-furred to gray-furred offspring if a homozygous white-furred individual mates with a gray-furred individual?
1:1
All gray-furred
3:1
All white-furred
If two parents are both homozygous recessive for a trait (bb), what is the genotype of all their children?
All children will be homozygous recessive (bb).
All children will be heterozygous (Bb).
Half the children will be homozygous dominant (BB).
Half the children will be heterozygous (Bb).
Which parental genotype combination could produce offspring with only type B or type O blood?
BO x BO
BB x OO
AB x BO
AO x BO
In a species where the allele for green eyes (G) is dominant over blue eyes (g), what is the expected ratio of green-eyed to blue-eyed offspring if a heterozygous green-eyed individual mates with a homozygous blue-eyed individual?
All green-eyed
3:1
All blue-eyed
1:1
