PRIMAVERA BIOLOGY B: UNIT 1 EXAM QUESTIONS AND ANSWERS
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PRIMAVERA BIOLOGY B: UNIT 1
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PRIMAVERA BIOLOGY B: UNIT 1
PRIMAVERA BIOLOGY B: UNIT 1 EXAM
A plant has red flowers. In this species, a red flower color is the dominant trait over a white flower color.
What can you say about this plant? - Answer- If the genotype is Rr, the phenotype will be red-flowered.
Which observation led Mendel to the idea that...
PRIMAVERA BIOLOGY B: UNIT 1 EXAM
A plant has red flowers. In this species, a red flower color is the dominant trait over a
white flower color.
What can you say about this plant? - Answer- If the genotype is Rr, the phenotype
will be red-flowered.
Which observation led Mendel to the idea that traits were controlled by more than a
single factor? - Answer- A trait that was not seen in the first generation may later
reappear in the second generation.
The two different X in Y individuals plays a role in increasing genetic biodiversity. -
Answer- X: alleles
Y: heterozygous
The Punnett squares show crosses for fur color. Black (B) is dominant, and white (b)
is recessive. Identify the Punnett square that shows a 1:1 ratio of homozygous
recessive to heterozygous. - Answer-
https://assets.learnosity.com/organisations/625/asset/media/1159915
Read the following statement.
A dihybrid cross experiment is carried out on pocket mice. The traits being observed
are fur color and tail length. In the F2 generation, 54 mice are dark brown with long
tails, 18 mice are dark brown with short tails, 18 mice are tan with long tails, and 6
mice are tan with short tails.
Which traits are dominant? - Answer- dark brown fur, long tail
Eye and body color in fruit flies are close together on the same chromosome.
What can be said about studying these traits? - Answer- The traits would not obey
the law of independent assortment because they are not inherited separately.
Scientists study apple trees. In the fruit color gene, G leads to green apples and is
dominant over red (g). S leads to sweet apples and is dominant over sour (s). They
find the alleles for the two genes are arranged as shown on the same chromosome.
Which of the following situations will they observe? - Answer- XXX INCORRECT
XXX
One gene will cancel out the effect of the other.
What is a case of an environmental effect changing a phenotype? - Answer-
Caterpillars in cocoons under different colors of light develop different-colored wings.
Why would a population have a trait controlled by only one allele? Select all that
apply. - Answer- That exact trait is necessary in order for the organism to function
properly.
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