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Animal Science 1 - 8.02

Total questions: 13

Worksheet time: 13mins

Name
Class
Date
1.

Compared to heritability estimates for yield grade, retail yield, and rate of gain in beef cattle, the heritability estimates for traits related to reproduction are:

a)

about the same

b)

lower

c)

much higher.

d)

slightly higher.

2.

The first stage of mitosis is:

a)

anaphase

b)

telophase

c)

prophase

d)

metaphase

3.

The mitochondrion of the cell converts energy stored as glucose into:

a)

cell membrane.

b)

deoxyribonucleic acid.

c)

adenosine triphosphate.

d)

cytoplasm.

4.

Compared to heritability estimates for muscle, length, and fat traits in swine, the heritability estimates for traits related to reproduction are:

a)

lower.

b)

about the same.

c)

much higher.

d)

slightly higher.

5.

After cell division by meiosis, the number of chromosomes each egg or sperm has is:

a)

1/4 the original.

b)

1/2 the original

c)

ten times the original

d)

twice the original

6.

The production of ovum is called:

a)

mitosis

b)

oogenesis

c)

zygote

d)

spermatogenesis

7.

In general, heritability estimates for beef cattle compared to swine are:

a)

about the same

b)

higher

c)

much lower

d)

slightly lower

8.

The site of protein synthesis inside the cell is the:

a)

ribosome

b)

cell membrane

c)

golgi body

d)

centrosome

9.

Located on chromosomes, the complex molecules that control the characteristics that are inherited from parents are called:

a)

sperm

b)

punneet squares

c)

genes

d)

eggs

10.

The body of an animal is made up of millions of tiny structural units called:

a)

cells

b)

hairs

c)

hormones

d)

muscles

11.

The type of cell division that increases the total number of cells and results in the animal’s growth is:

a)

fertilization

b)

genetic engineering

c)

meiosis

d)

mitosis

12.

If the heritability estimate for fat thickness is 40%, calf weaning weight is 25%, loin eye area is 70%, and rate of gain is 50%, which trait can be improved the fastest through selective breeding?

a)

calf weaning weight

b)

fat thickness

c)

loin eye area

d)

rate of gain

13.

The part of an animal cell that gives the cell the ability to grow, to digest food, and to divide is the:

a)

cell wall

b)

cytoplasm

c)

gene

d)

nucleus