Week 8: Introduction to Genetics Answers

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Which statement describes the offspring of the F1 generation when crossing a pea plant that is true breeding for green seeds with a pea plant that is true breeding for yellow seeds?

A
The green trait is the dominant trait.
B
The offspring will inherit one allele from each parent.
C
The offspring will have both green and yellow seeds.
D
Each offspring will have a unique set of alleles.
2
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Which statement best describes an understanding of genetics that would be missing without the work of Mendel?

A
The DNA codes for traits would not be known.
B
The protein codes for traits would not be known.
C
Some alleles are dominant, and some alleles are recessive.
D
Offspring receive two copies of each allele from each parent.
3

During an experiment, a scientist crosses a pea plant that has purple flowers with a pea plant that has white flowers. The plants that result from this cross in the F1 generation have both purple and white flowers. What can the scientist conclude?

A
White flowers are dominant over purple flowers.
B
Neither purple flowers nor white flowers are dominant.
C
The plants in the P generation were not true-breeding.
D
All the plants in the F2 generation will have purple flowers.
4

Which is the best example of a hypothesis leading to new experimental methods?

A
Gregor Mendel influenced the development of the theory that everything is made of cells.
B
Gregor Mendel continued the genetic research of Thomas Hunt Morgan, but Mendel used pea plants.
C
Thomas Hunt Morgan continued the genetic research of Gregor Mendel, but Morgan used fruit flies.
D
The theory that everything is made of cells influenced Gregor Mendel in his research.
5

Why did Gregor Mendel use peas in his experiments?

A
Peas grow very slowly.
B
Pea reproduction cannot be controlled.
C
Peas normally produce very few offspring.
D
Peas have characteristics that have two forms.
6

What is a gene?

A
a section of a protein that codes for DNA
B
the alternate version of a trait
C
the visible trait in the F1 generation
D
a section of DNA that codes for a specific trait
7

Gregor Mendel’s research formed the basis of the field of

A
genetics.
B
dominance.
C
recessiveness.
D
selective breeding.
8

Which statement describes Mendel’s hypotheses regarding gametes?

A
A gamete carries two genes for a trait.
B
A gamete carries one allele for a gene.
C
A gamete can carry multiple alleles for a trait.
D
Some gametes are dominant and some are recessive.
9

In pea plants, tall plant height is dominant over short plant height. If there are 200 short plants in the F2 generation from a cross that followed Mendel’s methods, about how many plants will be tall in that generation?

A
200
B
300
C
600
D
1,000
10

The table below summarizes Mendel’s results for the F2 generation.Mendel’s ResultsPlant height787 tall277 shortFlower color705 purple224 whitePod color428 green152 yellowPod shape882 inflated299 constrictedSeed color6,022 yellowx greenSeed shape5,474 smooth1,850 wrinkledWhat number should replace the letter x in the “Seed color” row?

A
18,066
B
3,011
C
207
D
2,001

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