AnswersBiologyIntroduction to Genetics

Pretest Answers

10 verified answers
1
Free Preview

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 cap f sub 1 generation have both purple and white flowers. What can the scientist conclude?

A
All the plants in the cap f sub 2 generation will have purple flowers.
B
The plants in the cap p generation were not true-breeding.
C
Neither purple flowers nor white flowers are dominant.
D
White flowers are dominant over purple flowers.
2
Free Preview

Why did Gregor Mendel use peas in his experiments?

A
Pea reproduction cannot be controlled.
B
Peas grow very slowly.
C
Peas have characteristics that have two forms.
D
Peas normally produce very few offspring.
4

Which statement best describes an understanding of genetics that would be missing without the work of Mendel?

A
Offspring receive two copies of each allele from each parent.
B
The DNA codes for traits would not be known.
C
Some alleles are dominant, and some alleles are recessive.
D
The protein codes for traits would not be known.
5

What controls traits and inheritance?

A
gametes
B
nucleic acids
C
temperature
D
proteins
7

Which statement describes Mendel’s hypotheses regarding gametes?

A
A gamete can carry multiple alleles for a trait.
B
A gamete carries one allele for a gene.
C
Some gametes are dominant and some are recessive.
D
A gamete carries two genes for a trait.
8

What is a gene?

A
a section of a protein that codes for DNA
B
a section of DNA that codes for a specific trait
C
the alternate version of a trait
D
the visible trait in the cap f sub 1 generation
9

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

A
genetics.
B
selective breeding.
C
dominance.
D
recessiveness.
10

Which statement describes the offspring of the cap f sub 1 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 offspring will have both green and yellow seeds.
B
Each offspring will have a unique set of alleles.
C
The offspring will inherit one allele from each parent.
D
The green trait is the dominant trait.

Did you find these answers helpful?