For the cross AAbb x AaBb, what is the phenotype ratio? (answermust be four numbers seperated by colons)
A_B_: aaB_ : A_bb : aabb = _________
(ANSWERS ARE NOT: 9:3:3:1, 1:1:1:1, 1:1,4:4:4:4)
genotype ratio: 1:1:1:1
progenies: AaBb, AAbb, Aabb, AABb
For the cross AAbb x AaBb, what is the phenotype ratio? (answermust be four numbers seperated by colons)
A_B_: aaB_ : A_bb : aabb = _________
(ANSWERS ARE NOT: 9:3:3:1, 1:1:1:1, 1:1,4:4:4:4)
genotype ratio: 1:1:1:1
progenies: AaBb, AAbb, Aabb, AABb
Related textbook solutions
Related questions
If I observe a bed of mussels on the coast of California in which five species live where the abundances of each species are 22 for species #1, 466 for species #2, 719 for species #3, 18 for species #4, and 2,699 for species #5, what is the probability that I would randomly pick the third species?
(answer to 2 decimal places)
QUESTION 12
Which of the following calculations require that you utilize the addition rule?
| A) Calculate the probability of a child having either sickle-cell anemia or cystic fibrosis if parents are each heterozygous for both | |||||
B) Calculate the probability of each of four children having cystic fibrosis if the parents are both heterozygous.
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| C) Calculate the probability of children with both cystic fibrosis and polydactyly when parents are each heterozygous for both genes | |||||
| D) Calculate the probability of purple flower color in a plot of 50 plants seeded from a self-fertilizing heterozygous parent plant | |||||
| E) | Calculate the probability of black offspring from the cross AaBb à AaBb, when B is the symbol for black |
In rats, several independently assorting autosomal genes affectcoat color. Gene A controls the distribution of yellow pigment inhair, and gene B causes black pigmentation. The two genes interactas follows: AâBâ (gray), Aâbb (yellow), aaBâ (black), and aabb(cream). These genotypes are only expressed in the presence of thedominant allele of a third gene, C; rats with genotype cc arealbino.
a. Deduce the genotype of each albino mice, to the extent thatis possible, in the following table. Explain your answers.
True-breeding parents | F1 | F2 offspring |
Gray x albino-1 | All gray | 3/4 gray : 1/4 albino |
Gray x albino-2 | All gray | 9/16 gray : 3/16 yellow : 4/16 albino |
b. Deduce the genotype and phenotype of each parent in thefollowing table. Explain your answers.
Parents | Numbers of offspring |
Cross 1 | 135 gray, 83 albino, 47 yellow, 44 black, 16 cream |
Cross 2 | 103 albino, 74 black, 25 cream |
c. A gray-colored rat is mated with one that is yellow. Theoffspring include an albino rat and a cream-colored rat. Diagramthis cross. Be sure to include the Punnett square and thephenotypic ratio in the offspring.
