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20 questions
In mice black fur color (B) is dominant over brown fur color(b).In a cross between two heterozygous mice
(Next 2 questions will be about this information)
a. what is the probability of a black male mouse?
1/2
1/4
3/4
3/8
b. What is the probability of 3 brown colored mice?
1/8
1/16
1/64
3/64
27/64
In pea plants tall stems(T) are dominant over short stems(t) and round seeds(R) are dominant over wrinkled seeds(r). Consider the following cross: TtRr X Ttrr
Next 4 questions will be about this information. Please take notes.
a. Find the number of possible phenotypes
2
4
6
8
b. Find the number of possible genotypes
2
4
6
9
c. What is the chance of having tall, wrinkled seeded plants?
1/4
1/8
3/4
3/8
d. what is the chance of plant to have homozygous recessive genotype?
1/2
1/4
1/8
3/8
In a cross between a round(R)-yellow(Y) seeded plant and a wrinkled (r)- yellow(Y) seeded pea plant, green(y)-wrinkled (r) seeded offspring are produced.
(Next 2 questions will be about this information.)
a. What are the genotypes of parents?
RrYy X rrYy
RrYY X rrYy
RrYy X RrYy
RRYy X rrYy
RRYy X RrYY
b.Find the probability of having round-green seeded plants.
1/4
1/8
3/8
9/16
Plant I ( GgNnRr) X Plant II ( GgNnRr) are crossed. what is the proportion of the F1 will;
(Next 5 questions will be about that information)
a. be dominant for all 3 characteristics?
1/8
1/64
9/64
27/64
b. have a genotype GGNnrr?
1/8
1/64
2/64
12/64
c. be homozygous for all 3 characteristics?
1/18
3/32
8/64
27/64
d. find the possible number of phenotype?
2
4
6
8
27
d. find the possible number of genotypes?
4
8
18
27
Plant I (AaBbNnHh) X Plant II (aaBbNNHh)
Answer the next 4 questions for that cross.
a. find the possible number of phenotypes.
2
4
6
8
b. find the possible number of genotypes.
4
8
12
18
36
c. what is the proportion of a plant with A,b,N,h phenotype?
1/ 16
1/32
3/32
9/64
d. what is the proportion of a plant with aaBbNNHh genotype?
1/64
2/64
4/ 64
8/64
(Grey fur (G) is dominant over white fur (g) and Black eyes (B) are dominant over red eyes(b))
A male rabbit GGbb crossed with a female rabbit with ggBb.
Next 3 questions will be about this information.
a. how many out of 16, have grey fur and black eyes?
4
8
12
16
b. how many out of 16, have grey fur and red eyes?
4
8
12
16
c. how many out of 16, have white fur and black eyes?
0
4
8
16
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