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20 questions
In pea plants, round seeds (R) are dominant to wrinkled seeds (r). Which of the following represents the genotype of a pea plant that is homozygous dominant?
RR
round
Rr
wrinkled
rr
What are the possible phenotype(s) of the offspring?
(Brown hair (A) is dominant to blonde hair (a).)
50% Brown Hair and 50% Blonde Hair
25% Brown Hair and 75% Blonde Hair
75% Brown Hair and 25% Blonde Hair
0% Brown Hair and 100% Blonde Hair
What are the possible alleles a parent with the GgBb genotype could donate to their gametes? (Hint: F.O.I.L.)
GB, Gb, gB, gb
GB, GB, gb, gb
Gb, Gb, Gb, GB
GG, BB, gg, bb
What genotype is missing from this Punnett Square?
RrYy
RRYY
rryy
RrYY
Round (R) and yellow (Y) are dominant traits. Based off this Punnett square, what fraction of the offspring will have wrinkled, yellow seeds?
9/16
3/16
1/16
16/16
Black fur in mice (B) is dominant to brown fur (b).
Short tails (T) are dominant to long tails (t).
What percentage of the offspring of the cross BbTt x BBtt will have black fur and long tails?
0%
25%
50%
100%
What fraction of offspring from the cross AaBB x Aabb will be heterozygous for both traits? (Write out the Punnett square.)
1/16
1/4
1/2
3/16
Brown eyes (B) are dominant to green (b). What percent of offspring would be green?
25%
50%
75%
100%
3:4:3:6
1:2:3:4
9:3:3:1
8:4:3:1
Cross RRYY x rryy. R=round seeds, r=wrinkled seeds; Y=yellow seeds, y=green seeds. What percent will have Round/Yellow seeds?
0%
25%
50%
100%
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