WorksheetsGenetics Test Review 2020
Total questions: 16
Worksheet time: 11mins
Janet is homozygous for tongue rolling (TT). Her husband is heterozygous for tongue rolling (Tt). Which of the following genotypes is NOT possible for their offspring?
TT
tt
Tt
No tongue rolling
Straight thumb (H) is dominant over hitchhiker's thumb (h). A couple has 3 children. Child #3 has a genotype of Hh. What is the phenotype of this child?
Hitchhiker's thumb
Straight thumb
Hh
hh
Jessica learned about Genetics in class. She read that a green pea plant was crossed with a yellow pea plant. All the offspring had yellow seeds. What is the best explanation why the offspring had yellow seeds?
The offspring inherited more genes from the yellow parent.
The offspring inherited all of its genes from the yellow parent.
The genes from the yellow parent were recessive.
Their genes from the yellow parent were dominant.
Jennifer and John are siblings. Jennifer has brown hair and brown eyes like her mom and John has blonde hair and blue eyes like his dad. What is the best explanation for the differences in their features?
Jennifer inherited a greater number of chromosomes from her mother and John inherited a greater number of chromosomes from his dad.
Jennifer did not inherit any chromosomes from her dad and John did not inherit any chromosomes from his mom.
Jennifer inherited the same chromosomes as her mom and John inherited the same chromosomes as her dad.
Jennifer and John inherited different combinations of chromosomes from their mom and dad.
What is the percent chance that the offspring are homozygous dominant for the trait?
0%
25%
50%
75%
Joshua went to the farm and got a bright red apple from an apple tree. It had a rotten spot and had a worm inside it. Instead of eating it, Joshua took the seeds and planted them to grow a new apple tree. Which characteristic of the apple is its phenotype and why?
The seed found inside the apple because it a physical trait and acquired as the apple grows.
The type of worm inside, because the worms are genetically programmed to live in specific types of apples.
The appearance of the rotten spots, because the spots are physical traits that are acquired by experience.
The bright red color of the skin, because the skin color is physical trait that is inherited from the parents by the offspring.
How does selective breeding differ from natural selection?
Selective breeding occurs when members of a plant or animal species select the mates most desirable to themselves.
Selective breeding occurs when nature selects the members of a plant or animal species that will breed to keep evolution on track.
Selective breeding occurs when animals and plants select the environments in which they are best able to find their own mates.
Selective breeding occurs when humans make the selection of which male and female members of a plant or animal species will be allowed to mate to produce offspring with specific traits.
Which of the following is an example of artificial selection and why?
The environment where Venus Fly traps are found, because the Venus Fly traps select their environments.
Galapagos finches having different beaks, because they are different species.
Penguins not being able to fly, because their ability not being able to fly is a result of their environment.
Purebred dogs, because in order for the dog to stay purebred, humans select dogs with the traits they want to bred.
The nucleus contains the cell's genetic material in the form of
ADP
ATP
DNA
RNA
Which of the following processes show sexual reproduction?
Things like your eye color and height are not under your control. This is because they are determined by your genes. So, eye color is a good example of an inherited ______
Estate
Gene
Height
Trait
Which best explains why children often look like their parents?
Traits or characteristics are passed on to offspring by their parents.
Before being born, characteristics of offspring are randomly formed.
Babies begin to look like their parents as their features start to mature.
Babies form physical features similar to people they are around most often.
In the chart, the organism Rr represents a genetically __________ individual.
Heterozygous
Homogeneous
Homozygous
Retrozygous
In ducks, the gene for black feathers (B) is dominant over the allele for white feathers (b).
If a male duck that is heterozygous for feather color mates with a white female, what is the probability of having an offspring with white feathers?
0%
25%
50%
100%
The following illustrates the types of reproduction displayed by different organisms:
Parent Offspring
1. One Identical
2. Two Identical
3. One Different
4. Two Different
Which number describes asexual reproduction?
1
2
3
4
Jim and Mary are both heterozygous dominant for brown eyes. What percentage of their offspring will have blue eyes?
0%
25%
75%
100%
