WorksheetsMeiosis and Inheritance
Total questions: 12
Worksheet time: 6mins
If an organism is homozygous recessive for a trait, which of the following is not a possible genotype of the organism’s progeny?
AA
Aa
aa
Unable to determine
A Mendelian monohybrid cross would yield a genotypic ratio of ...
3:1
1:1
1:2:1
9:3:3:1
A student crosses a pea plant that is homozygous recessive (white flowers) with a heterozygous pea plant with the intention of obtaining offspring with white flowers. Assuming Mendelian inheritance, what percent of the offspring will have white flowers from his genetic cross?
0%
25%
50%
75%
100%
Which correctly describes the number of chromosomes before, during (after meiosis I), and after Meiosis in humans?
46-46-23
28-56-56
46-23-23
56-28-28
In pea plants, round seeds (R) are dominant to wrinkled seeds (r), and yellow seeds (Y) are dominant to green seeds (y). If you were to cross a Rryy plant with a rrYy plant, what percent of the offspring would have wrinkled, yellow seeds?
50%
25%
12.5%
100%
In pea plants, purple (P) flower color is dominant to white (p) flowers and yellow (Y) seeds are dominant to green (y) seeds. A cross is done between two plants and the results of the generation is analyzed.
Purple/Yellow-155 Purple/Green-146 White/Yellow-52 White/Green-49
What are the parental genotypes?
PPYy x ppYy
PpYy x Ppyy
PpYy x PpYy
PpYY x Ppyy
In a cross betweeen AABBCc x AaBbCc what is the probability that the offspring will be AaBbcc?
1/16
1/8
1/4
1/32
A hemophiliac mother and an unaffected father have children. What is the probability of their children being hemophiliacs based on sex?
Male: 100%
Female: 0%
Male: 50%
Female: 25%
Male: 100%
Female: 50%
Male: 50%
Female: 50%
The individuals shaded are affected by a genetic disorder. What can this trait be described as?
X-Linked Dominant
Autosomal Recessive
Autosomal Dominant
X-Linked Recessive
The pedigree below tracks the presence of attached earlobes, a recessive trait, through a family's generations. If individual III-6 married a man who was heterozygous for unattached earlobes, what is most likely to be true regarding their children?
All of their children would have unattached earlobes.
All the female children will have unattached earlobes, and all the male children will have attached earlobes.
The children would all have partially attached earlobes.
Half of their children would have attached earlobes.
You are studying fruit fly offspring. You cross a wild winged, gray female with a vestigial winged, black male. The offspring are as follows: 650 wild winged/gray, 595 vestigial winged/black, 107 wild winged/black, and 91 vestigial winged/gray. What is the recombination frequency between the genes for wing type and body color?
86.28%
6.30%
13.73%
7.42%
In mice agouti (A) is the wild type, yellow coat color, which is dominant to the black (a) coat color. A different gene controls whether or not the pigment is deposited in the fur. The dominant allele (D) causes albinism, while the recessive allele (d) allows the pigment in the mouse, regardless of the A/a allele. If a mouse with the genotype AaDd is crossed with a mouse that has the genotype aaDd, what is the probability that their offspring is yellow?
75%
25%
50%
12.5%
