Genetics Review-2019 Question Preview (ID: 48531)


Review For Quarterly.

By using gene therapy in fruits and vegetables, they will
a) Have an increased risk of disease.
b) Be affected by other diseases.
c) Not have anything to treat the diseases.
d) Have a new defense against disease.

Which of the following is the best example of artificial selection?
a) Certain fruits may become unavailable because of disease.
b) The most desirable traits were selected to reproduce.
c) Fruit with large seeds are difficult to reproduce.
d) Pollination by bees is part of the process of artificial selection.

Through the years, certain traits in watermelons were selectively bred by humans. Which of the following is true about selective breeding of watermelons?
a) The traits of seed size and peel color have been artificially selected in watermelons.
b) The attractiveness of the fruit to wild animals has been artificially selected.
c) The traits of taste and seed size have been artificially selected in watermelons.
d) The oval shape of the watermelon has been artificially selected.

Explain how it is possible for two brown furred squirrels to have a white furred offspring?
a) If both parents are heterozygous.
b) If both parents are homozygous dominant.
c) If each offspring gets 100% of its genes from each parent.
d) If the parents have asexual reproduction.

What is true about squirrel reproduction?
a) The offspring are always genetically identical to both of their parents.
b) A set of identical chromosomes is passed on to the offspring.
c) All offspring are identical genetically to each other.
d) The offspring have genetic variation.

What is true about squirrel reproduction?
a) They reproduce sexually because two parents contribute genetic material to the offspring.
b) The offspring are always genetically identical to both of their parents.
c) . A set of identical chromosomes is passed on to the offspring
d) . All offspring are identical genetically to each other.

Chromosomes play an important role in variation because they _________________
a) deliver information from the environment
b) release energy
c) regulate protein production
d) none of the above

The main effect of a genetic mutation is to _________________.
a) increase rate of reproduction
b) reduce the life span of organisms
c) change a protein produced by the organism
d) keep the genes the same

If a white squirrel that lives in the woods in Odenton is born with this as a mutation, what prediction can be made about the mutation?
a) This mutation would be beneficial because it would help the squirrel blend into the environment.
b) This mutation would be neutral because fur color will not affect the survival of the squirrel.
c) This mutation would be a harmful mutation because it would make the squirrel more visible to predators.
d) There is no way to determine if this mutation would be beneficial, harmful or have no effect at all.

Some scientists claim the gene that controls the production of the proteins for fur color is located on a chromosome. Which of the following provides evidence to support the claim?
a) Other mammals with white fur have genes located in similar locations.
b) Some squirrels have this gene in a different location.
c) A mutation in this gene may cause a variation of fur color.
d) The proteins for fur color is responsible for other traits in squirrels.

Some scientists claim the gene that controls the production of the proteins for fur color is located on a chromosome. Which of the following provides evidence to support the claim?
a) All squirrels with this gene have brown fur color.
b) Other mammals with white fur have genes located in similar locations.
c) Some squirrels have this gene in a different location.
d) The proteins for fur color is responsible for other traits in squirrels.

Which description best supports that squirrels are sexually reproducing organisms?
a) The habitat of squirrels includes open grassy areas and trees
b) The breeding season for males and females varies from year to year.
c) They have a very thick coat of hair and can see extremely well.
d) Squirrels can reproduce at a couple months old.

Certain animal behaviors increase
a) mortality rate
b) reproductive success
c) food intake
d)

How do animals help with plant reproduction?
a) They eat the seeds and poop them out elsewhere.
b) They eat the leaves.
c) They camouflage themselves to the color of the plants.
d)

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