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Worksheets8.02: Animal Genetics
Total questions: 20
Worksheet time: 22mins
The first stage of mitosis is:
anaphase
telophase
prophase
metaphase
The part of an animal cell that gives the cell the ability to grow, to digest food, and to divide is the:
cell wall
cytoplasm
gene
nucleus
Located on chromosomes, the complex molecules that control the characteristics that are inherited from parents are called:
eggs
genes
Punnett squares
sperm
The type of cell division that increases the total number of cells and results in the animal’s growth is:
fertilization
genetic engineering
meiosis
mitosis
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:
about the same
lower
much higher
slightly higher
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?
Calf weaning weight
Fat thickness
Loin eye area
Rate of gain
The site of protein synthesis inside the cell is the:
ribosome
cell membrane
golgi body
centrosome
The body of an animal is made up of millions of tiny structural units called:
cells
hairs
hormones
muscles
In general, heritability estimates for beef cattle compared to swine are:
about the same
higher
much lower
slightly lower
After cell division by meiosis, the number of chromosomes each egg or sperm has is:
1/4 the original
1/2 the original
ten times the original
twice the original
The mitochondrion of the cell converts energy stored as glucose into:
cell membrane
deoxyribonucleic acid
adenosine triphosphate (ATP)
cytoplasm
The production of ovum is called:
mitosis
oogenesis
zygote
spermatogenesis
Compared to heritability estimates for muscle, length, and fat traits in swine, the heritability estimates for traits related to reproduction are:
about the same
lower
much higher
slightly higher
What is the cell membrane?
Thin layer of protein and fat that surrounds the cell that allows some substances to pass into the cell and blocks others.
Jellylike substance that gives the cell shape and contains components necessary for cell functions.
Transports materials through the cell.
Fluid filled membrane that fills with food and waste products inside the cell.
What is the importance of the Cytoplasm?
Located near the nucleus and produces the membrane that surrounds the lysosomes.
Site of protein synthesis.
Thin layer of protein and fat that surrounds the cell that allows some substances can pass into the cell and blocks others materials from entering.
Jellylike substance that gives the cell shape and contains components necessary for cell functions.
Which cell part contains digestive enzymes that allow for digestion of cell nutrients?
Nucleus
Lysosome
Mitochondria
Ribosome
Which cell part is a fluid filled membrane that fills with food and waste products inside the cell?
Vacuole
Centrosome
Protoplasm
Cytoplasm
In cattle, which genes are controlled inherited genes?
Carcass traits
Growth rate
Feed efficiency
All of the above
True or False: A homozygous gene pair carries two genes for a trait.
True
False
True or False: A heterozygous gene pair carries two different genes that affect a trait.
True
False
