Week 8: Introduction to Genetics Answers

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1
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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.

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