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Genetics Review
Test Description: Basic genetics concepts.
Instructions: Answer all questions to get your test result.
1) In guinea pigs, short hair is dominant over long hair. If a short haired SS guinea pig is crossed with a long haired ss guinea pig, what is the probability the offspring will have long hair?
A
0%
B
100%
C
50%
D
25%
2) Which genotype is homozygous dominant?
A
Bb
B
bB
C
bb
D
BB
3) Which of the following is a genotype?
A
Red Hair
B
25%
C
Aa
D
heterozygous
4) Which of the following is a phenotype?
A
Brown Hair
B
Bb
C
genotype
D
BB
5) Tongue-curling in humans is a dominant genetic trait. Suppose a man who is Tt for tongue-curling marries a woman who is also Tt for this trait. What is the probability their children CAN roll their tongues??
A
0%
B
100%
C
75%
D
50%
6) The genotype Bb can be described as ______.
A
heterozygous
B
chromosome
C
purebred
D
homozygous
7) What is a segment of DNA that codes for a specific trait?
A
Phenotype
B
DNA
C
chromosome
D
gene
8) The physical expression of a gene is _______. (also what you see)
A
genotype
B
phenotyope
C
trait
D
DNA
9) Blindness is a dominant trait is mice. If two homozygous recessive mice have babies, what is the percent the babies will be blind?
A
25%
B
75%
C
0%
D
100%
10) What is it called when DNA is manipulated, changed, deleted, or changed in any way to help improve the characteristics of an organism?
A
Trait manipulation
B
Bio medical research
C
Selective Breeding
D
Genetic engineering
11) According to the rules of Codominance- what color would the offspring of a red flower and white flower be?
A
pink
B
white
C
red and white
D
red
12) According to the rules of Incomplete Dominance- what color would the offspring of a red flower and white flower be?
A
red and white
B
white
C
red
D
pink
13) A homozygous dominant tall parent and a short parent have a baby? What is most likely that babies phenotype?
A
Tt
B
TT
C
short
D
tall
14) How many total chromosomes do humans inherit from their parents?
A
46
B
92
C
23
D
10,000
15) A monster does not have horns (hh). This monster really wants a baby with horns. What would the genotype of the other parent have to be to ensure the baby has a 100% chance of having horns?
A
hh
B
this is impossible
C
HH
D
Hh
*select an answer for all questions
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