Homework Questions

Question 1

If a dogs muscle cells have 78 chromosomes, how many chromosomes in its sperm cells?

Answer 1

39

Question 2

Separation of the sister chromatids is a characteristic of which stage of mitosis?

Answer 2

Anaphase

Question 3

A cell in S phase is _____.

Answer 3

Preparing to divide

Question 4

Crossing over occurs between _____.

Answer 4

Homologous chromosomes

Question 5

Identical copies of a chromosomes held together by cohesion at the centromere are called ______.

Answer 5

Sister chromatids

Question 6

Which of the following cells can undergo mitosis?
Lung cells in a dog
The bacteria that causes strep throat
Red blood cells in a human
Sperm cells in a whale

Answer 6

Lung cells in a dog

Question 7

Which of the following events do NOT occur during interphase?

Answer 7

Disappearance of the nucleus

Question 8

The mitosis spindles arise from which cell structure?

Answer 8

Centrosomes

Question 9

Which is NOT true for meiosis?
It adds to the diversity within a species
It forms 4 unique haploid cells
It contains 2 rounds of cell division
It creates gametes
It forms 4 identical diploid cells
It happens only in the reproductive organs

Answer 9

It forms 4 identical diploid cells

Question 10

Your father contributed ______ to you.

Answer 10

A haploid set of chromosomes

Question 11

What happens immediately after the chromosomes are lined up single file?

Answer 11

Sister chromatids separate to opposite poles

Question 12

Cyclins _____.
Both answers are true
Acts as checkpoints for the progression through the cell cycle
Neither answer is true
Prevent uncontrolled cell division

Answer 12

Both answers are true

Question 13

Attachment of the mitotic spindle fibers to the kinetochores is a characteristic of which stage of mitosis?

Answer 13

Prometaphase

Question 14

The fusing of Golgi vesicles at the metaphase plate of dividing plant cells forms what structure?

Answer 14

Cell plate

Question 15

The part of meiosis that is similar to mitosis is _____.

Answer 15

Meiosis II

Question 16

Klinefelter syndrome is a genetic condition in which a male is born with an extra copy of the X chromosome. This results from _____.

Answer 16

Nondisjunction during Anaphase I or Anaphase II

Question 17

Which Omaha we is not equivalent to the others?
4 homologous chromatids
2 alleles
A bivalent
2 duplicated homologous chromosomes
A tetrad

Answer 17

2 alleles

Question 18

Imagine you are performing a cross involving seed color in garden pea plants. What F1 offspring would you expect if you cross true-breeding parents with green seeds and yellow seeds? Yellow seed color is dominant over green

Answer 18

100 percent yellow seeds

Question 19

In humans, the gene for insulin is located on the short arm of Chromosome 11. Which of the following is NOT true for insulin?
Insulin is only produced in pancreatic cells
The insulin gene is only found in pancreatic cells
The insulin gene is autosomal
The insulin gene is found in every cell of your body

Answer 19

The insulin gene is only found in pancreatic cells

Question 20

A recessive trait will be observed in individuals that are _____ for that trait.

Answer 20

Homozygous

Question 21

If the allele encoding polydactyly (six fingers) is dominant, why do people have five fingers?

Answer 21

The polydactyly allele is very rare in the human population

Question 22

Elephants have 56 chromosomes in their skin cells. What is n for elephants?

Answer 22

28

Question 23

The observable traits expressed by an organism are described as its _____.

Answer 23

Phenotype

Question 24

Which describes the genetic content of huge two daughter cells in prophase II of meiosis?

Answer 24

Haploid with two alleles of each gene

Question 25

At which stage of meiosis are sister chromatids separated from each other?

Answer 25

Anaphase II

Question 26

The image below illustrates the process of _____.
Cell, DNA replication, sgregstion (split into two, cytokinesis (two separate cellsJ

Answer 26

Binary fission

Question 27

You’ve decided to use your biology degree to go raise sheep in a remote village in the mountains of South America. You desire to raise dark wool sheep, as their wool brings a better price at the local market. A nearby sheep rancher has a dark wool sheep, named Baa Baa, who only produces dark wool offspring when mated with ,Igor wool ewes. You remember your biology training and know that dark wool is dominant. He offers to sell you some of Baa Baa’s dark wool offspring to start your dark wool fsrm. Do you take up on his offer?

Answer 27

No. While Baa Baa is a black sheep, all of his dark wool offspring would be heterozygous and not the breeding pairs would need

Question 28

Which of Mendels Laws address the large range of genetic diversity among individuals in a species that reproduces sexually?

Answer 28

Law of independent assortment