WorksheetsHeredity Quiz
Total questions: 14
Worksheet time: 20mins
An organism’s physical appearance is its
Genotype
Phenotype
Heterozygous
Homozygous
An organism's genetic make-up is its
Genotype
Phenotype
Homozygous
Heterozygous
Which of these are heterozygous? (choose more than one)
BB
bb
Bb
bB
Which of these are homozygous? (choose more than one)
BB
bb
Bb
bB
The saguaro is a tree-like cactus that grows over 50 feet tall in desert areas of North America. Often times, these cactuses look almost identical to each other, with 1 large trunk in the middle and 2 shorter trunks on either side. These trunks can absorb hundreds of gallons of water and save it for hot, dry periods. The cactus produces flowers in the spring and relies mainly on bats for pollination. The flowers produce fleshy fruit filled with thousands of seeds, each one genetically unique. The fruit falls to the desert floor where a new cactus may sprout.
Which best explains how the cactus reproduces?
Sexually, because each cactus is a clone.
Sexually, because it gets its genes from 2 parents.
Asexually, because each of their seeds is genetically unique.
Asexually, because they all look almost identical.
Which statement best explains the difference between sexual and asexual reproduction?
Asexual reproduction produces offspring that are much stronger than sexual reproduction.
All plants use asexual reproduction because plants don’t have male and female parts.
Only animals reproduce sexually.
In sexual reproduction, offspring get more variety in their genes than asexual reproduction.
The common snail has both male and female reproductive parts. To reproduce, two snails come together to exchange sperm. Each snail deposits its own eggs and the sperm that was donated into a gooey cocoon that it leaves in the soil. Baby snails emerge from this cocoon a few weeks later.
Which statement best explains how the snail reproduces?
Sexually, because baby snails emerge from a cocoon.
Sexually, because the cocoon is getting genetic material from 2 different parents.
Asexually, because snails have both male and female reproductive parts.
Asexually, because snails are simple animals.
Based on this cross, which box(es) would have heterozygous offspring?
1 and 4
4 only
2 and 3
1 only
Based on this cross, what is the probability of a offspring with a genotype of aa?
0/4, 0%
1/4, 25%
2/4, 50%
3/4, 75%
Based on this cross, how many possible phenotypes could these offspring have?
1
2
3
4
Which statement concerning a pair of alleles for a gene controlling a single characteristic in humans is true?
Both genes come from the father.
The genes come randomly in pairs from either the mother or father.
One gene comes from the mother and one gene comes from the father.
Both genes come from the mother.
An extra finger in humans is rare but is due to a dominant gene. When one parent is normal and the other parent has an extra finger but is heterozygous for the trait, what is the probability that the first child will be normal?
0%
25%
50%
75%
Mr. and Mrs. Nye recently had a baby. Before young William Nye was born, it was quite a mystery as to what color eyes he would have. Mr. Nye has blue eyes, and Mrs. Nye has brown eyes. When William was born, his eyes were blue! Eye color is a trait that is controlled by genes, and the dominant eye color is brown.
Which statement must be true regarding the Nye family?
Mr. Nye must have been heterozygous for eye color.
Mrs. Nye must have been homozygous for eye color.
One of Mr. Nye's parents must have had brown eyes.
Mrs. Nye must have been heterozygous for eye color.
Which of these terms best describes William's eye color? (from previous question)
Homozygous recessive
Homozygous dominant
Heterozygous
Heterozygous dominant
