AnswersFL-2002070-MJ Comprehensive Science 2Lab: Heredity and Punnett Squares

Lab: Heredity and Punnett Squares — Unit test Answers

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1
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Which best describes the offspring of a solid-colored cow (CC) with a spotted cow (SS), assuming the alleles are codominant?

A
All the offspring will have stripes.
B
All the offspring will be completely solid.
C
All the offspring will be completely spotted.
D
All the offspring will have a mixture of spots and solid colors.
2
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Which statement describes the blood type of a person with the alleles IAi?

A
It is type AB because I and i are codominant.
B
It is type AB because A and i are codominant.
C
It is type A because i is dominant and A is recessive.
D
It is type A because A is dominant and i is recessive.
3

A mutation causes a tomato plant to have fewer and smaller leaves. Plants use their leaves to make food. Which best describes this mutation?

A
It is harmful because it obviously affects the plant’s ability to survive.
B
It is beneficial because it affects the plant’s physical appearance.
C
It is neutral because it does not obviously affect the plant’s ability to survive.
D
It is neutral because it affects the plant’s physical appearance.
4

Shira listed the steps for protein production in cells.1. A strand of RNA is made.2. RNA leaves the nucleus.3. RNA moves to the ribosome.4. A protein is made.

A
DNA unzips after step 1.
B
DNA unzips before step 1.
C
DNA is replicated after step 3.
D
DNA is replicated before step 3.
5

Which best describes a helpful genetic mutation?

A
a mutation that cannot be passed on to offspring
B
a mutation that increases an organism's chances of survival
C
a mutation that results in no change to the organism's physical appearance
D
a mutation that causes cells to divide rapidly and uncontrollably
6

Which structure carries instructions for producing the proteins that help make a person’s hair curly?

A
phosphate
B
deoxyribose
C
lipid
D
gene
7

If someone has a dominant phenotype, their genotype can either be heterozygous or homozygous. The diagram shows a Punnett square for a particular trait among two parents, but one letter of a parent’s genotype is missing.

Question illustration
A
T because there are offspring that are heterozygous
B
T because there are offspring that are homozygous
C
t because there are offspring that are homozygous.
D
t because there are offspring that are heterozygous.
8

Which are ways of showing probability? Select 4 options.50%5571 × 10425%

Question illustration
A
50%
B
557
C
Option
Option C
D
1 × 104
E
25%
F
Option
Option F
9

A fruit fly has black eyes. Having red eyes is a dominant trait (R) and having black eyes is a recessive trait (r).Which describes the fruit fly’s genotype and phenotype?

A
genotype: black eyesphenotype: Rr
B
genotype: black eyesphenotype: rr
C
genotype: rrphenotype: black eyes
D
genotype: Rrphenotype: black eyes
10

The diagram represents part of Mendel's pea plant experiment. He crossed white-flowered pea plants with purple-flowered pea plants. Flower color has the same type of heredity as pea color.

Question illustration
A
one plant with white flowers and three with purple flowers
B
one plant with purple flowers and three with white flowers
C
four plants with white flowers
D
four plants with purple flowers
11

In humans, unattached earlobes are dominant over attached earlobes.

A
Ee
B
e
C
ee
D
E
12

Which best describes a recessive allele?

A
always inherited from a parent when a dominant allele is inherited from the other parent
B
never inherited from a parent when a dominant allele is inherited from the other parent
C
only determines phenotype when a dominant allele for the same trait is present
D
does not determine phenotype when a dominant allele for the same trait is present
13

Which best describes the offspring of a curly-haired dog (CC) with a straight-haired dog (SS), assuming incomplete dominance?

A
All the offspring will be hairless.
B
All the offspring will have straight hair.
C
All the offspring will have curly hair.
D
All the offspring will have wavy hair.
14

Which best describes a genetic mutation?

A
a random change to an organism’s DNA
B
a condition that shortens an organism's lifespan
C
a trait that an organism inherits from its parents
D
a building block of an organism's genetic code
15

Which examples are harmful mutations? Select two answers.one that causes a person to have a light patch of hair colorone that changes a mouse’s eye shape but not its eyesightone that allows a moth to blend into its environmentone that reduces a bean plant’s ability to make foodone that increases a plant’s susceptibility to disease

A
one that causes a person to have a light patch of hair color
B
one that changes a mouse’s eye shape but not its eyesight
C
one that allows a moth to blend into its environment
D
one that reduces a bean plant’s ability to make food
E
one that increases a plant’s susceptibility to disease
16

In cats, having a short tail is recessive to having a long tail. If a mother cat is heterozygous for this trait and a father cat is homozygous dominant for having a long tail, what will most likely be true about their offspring?

A
All will have long tails.
B
All will have short tails.
C
About will have short tails.
Option C
D
About will have long tails.
Option D
17

Which nitrogen base sequence is the partner of T-C-A-G-C-A?

A
A-C-G-A-C-T
B
C-A-G-A-T-G
C
A-G-T-C-G-T
D
T-C-A-G-C-A
18

Sandra is heterozygous for eye shape.What does this mean?

A
She has two of the same alleles for eye shape, one from each parent.
B
She has two different alleles for eye shape, one from each parent.
C
She has only one allele for eye shape, which she received from one parent.
D
She has two alleles for eye shape, both from the same parent.
19

What was known before Franklin and Wilkins conducted their studies of DNA? Select three options.DNA is found in the nucleus of a cell. The human genetic code is made of 50,000 genes.Organisms store and transmit genetic information. DNA has a double-helix structure. Cells contain protein molecules.

A
DNA is found in the nucleus of a cell.
B
The human genetic code is made of 50,000 genes.
C
Organisms store and transmit genetic information.
D
DNA has a double-helix structure.
E
Cells contain protein molecules.
20

Clarence made a diagram to compare codominance and incomplete dominance.

Question illustration
A
Neither allele is dominant.
B
An intermediate phenotype is expressed in offspring.
C
One allele is dominant over the other.
D
Both dominant alleles are fully expressed in offspring.

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