AnswersFL-2000310-Biology 1 Sem 1 - FlexProbability of Inheritance

Probability of Inheritance Answers

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Purple flowers are dominant over white flowers. A heterozygous purple flower is crossed with another heterozygous purple flower. What will the ratio of purple to white be?

A
3:1
B
1:3
C
2:2
D
4:0
2
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Mendel crossed two plants that were heterozygous for the trait of flower color. Which genotypes could he have used to represent the cross?

A
PP ´ PP
B
Pp ´ Pp
C
pp ´ pp
D
Pp ´ PP
3

Which describes the mating of organisms that have different homozygous alleles for a single trait?

A
monohybrid cross
B
dihybrid cross
C
homozygous cross
D
heterozygous cross
4

There are two different alleles for flower color, P and p. The image shows a white sweet pea with a genotypeo of pp.What can you surmise from the labeled image?

Question illustration
A
The genotype is heterozygous.
B
White petal color is a recessive trait.
C
White petal color is a dominant trait.
D
The phenotype is heterozygous.
5

In pea plants, tallness (T) is dominant to shortness (t). What are the predicted percentages of the genotypes of the offspring if a homozygous short plant is crossed with a heterozygous tall plant?

A
25 percent Tt, 75 percent tt
B
25 percent tall, 75 percent short
C
50 percent Tt, 50 percent tt
D
50 percent tall, 50 percent short
6

What is one of the reasons why Gregor Mendel chose to study pea plants?

A
They exhibit only a single trait.
B
They produce flowers.
C
They grow very slowly.
D
They reproduce sexually.
7

A plant can produce either purple flowers or white flowers. The purple flower color is dominant over the white flower color. What is the ratio of the offspring with purple flowers to the total number of offspring if two plants that are heterozygous for purple flowers are crossed?

A
1:4
B
2:4
C
3:4
D
4:4
8

Which describes the notation Tt for the trait of plant height?

A
homozygous genotype
B
heterozygous genotype
C
homozygous phenotype
D
heterozygous phenotype
9

The Punnett square predicts the ratio of genotypes in the offspring, based on the genotypes of the parents. The Punnett square below examines the chance of offspring having freckles, which is a dominant trait.Based on the Punnett square, what is the probability that the offspring will have freckles?

Question illustration
A
25 percent
B
50 percent
C
75 percent
D
100 percent
10

Which includes the physical characteristics of an organism?

A
gene
B
allele
C
genotype
D
phenotype
11

Which describes the notation Tt for the trait of plant height?

A
homozygous genotype
B
heterozygous genotype
C
homozygous phenotype
D
heterozygous phenotype
12

Which describes the mating of organisms that have different homozygous alleles for a single trait?

A
monohybrid cross
B
dihybrid cross
C
homozygous cross
D
heterozygous cross
13

In pea plants, tallness (T) is dominant to shortness (t). What are the predicted percentages of the genotypes of the offspring if a homozygous short plant is crossed with a heterozygous tall plant?

A
25 percent Tt, 75 percent tt
B
25 percent tall, 75 percent short
C
50 percent Tt, 50 percent tt
D
50 percent tall, 50 percent short
14

Purple flowers are dominant over white flowers. A heterozygous purple flower is crossed with another heterozygous purple flower. What will the ratio of purple to white be?

A
3:1
B
1:3
C
2:2
D
4:0
15

Which term describes an organism that has identical alleles for a trait?

A
homozygous
B
heterozygous
C
dominant
D
recessive
16

Mendel crossed two plants that were heterozygous for the trait of flower color. Which genotypes could he have used to represent the cross?

A
PP ´ PP
B
Pp ´ Pp
C
pp ´ pp
D
Pp ´ PP
17

Why did Gregor Mendel choose to use purebred plants in his experiments?

A
They reproduce sexually.
B
They exhibit only one form of a trait.
C
They have a variety of traits.
D
They reproduce asexually.
18

There are two different alleles for flower color, P and p. The image shows a purple sweet pea that is labeled with its two alleles for petal color.Which is the genotype of the sweet pea?

Question illustration
A
heterozygous dominant
B
heterozygous recessive
C
homozygous dominant
D
homozygous recessive
19

What is one of the reasons why Gregor Mendel chose to study pea plants?

A
They exhibit only a single trait.
B
They produce flowers.
C
They grow very slowly.
D
They reproduce sexually.
20

A plant can produce either purple flowers or white flowers. The purple flower color is dominant over the white flower color. What is the ratio of the offspring with purple flowers to the total number of offspring if two plants that are heterozygous for purple flowers are crossed?

A
1:4
B
2:4
C
3:4
D
4:4

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