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In an example of recessive epistasis the product H substance is needed to express the blood antigen. A mating of IB I O Hh X I A I O Hh should produce what ratio of blood types?

a.

1/4 AB, 1/8 A, 1/8 B, 1/2 O

b.

3/8 AB, 3/16 A, 3/16 B, 1/4 O

c.

3/16 AB, 3/8 A, 3/16 B, 1/4 O

d.

1/4 AB, 3/16 A, 3/16 B, 3/8 O

e.

3/16 AB, 3/16 A, 3/16 B, 7/16 O

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Irving Heathcote
Irving HeathcoteLv2
28 Sep 2019

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Related questions

1. In humans, blood types A and B are codominant to each otherand each is dominant to O. What blood types are possible among theoffspring of a couple of blood types AB and A?

Select one:

a. A and B only

b. A, B, and O only

c. A and AB only

d. A, B, AB, and O

e. A, B, and AB only

2. You are studying body color in an African spider and havefound that it is controlled by a single gene with four alleles: B(brown), br (red), bg (green), and by (yellow). B is dominant toall the other alleles, and by is recessive to all the otheralleles. The bg allele is dominant to by but recessive to br. Youcross a pure-breeding brown spider with a pure-breeding greenspider. Predict the genotype of the progeny.

Select one:

a. B/by

b. Br/bg

c. br/by

d. B/bg

e. by/bg

3. A mother of blood type A gives birth to a child with bloodtype O. Which of the following could NOT be the blood type of thefather? Select one:

a. A

b. Any type is a possible blood type of the father

c. AB

d. B

e. O

4. Crossing two yellow mice results in 2/3 yellow offspring and1/3 nonyellow offspring. What percentage of offspring would youexpect to be nonyellow if you crossed two nonyellow mice? Selectone:

a. 100%

b. 33%

c. 75%

d. 25%

e. 66%

5. Coat color is determined by two loci in large cats. Two pinkpanthers fall in love and produce a large litter of baby pantherswith the following phenotypic ratios: 12/16 pink; 3/16 black; and1/16 whitE. What is the genotype of the pink progeny?

Select one:

a. A_ bb

b. aa bb

c. aa B_

d. A_ B_ and A_ bb

e. A_ B_

Find the correct statement (may require you to draw pedigrees and Punnett squares) A) A father with A blood type and a mother with B blood type, will always produce
children that are AB
B) A person with ii alleles will produce red blood cell that contain glycolipids with
galactosamine and galactose sugars
C) A person with the A blood type can only give blood to an A or O individual
D) If an AB father conceives a child with an O mother, the children have a 50%-50%
chance of being either AB or O
E) Each person has three alleles of the blood type gene
F) The IA allele is codominant to the i allele
G) A person with a B blood type will produce antibodies against the A blood type antigen

1. In hamsters, B is a dominant allele coding for black fur and w is a recessive allele coding for white fur. Match up the appropriate probabilities of mating outcomes with the parental genotypes.

Probabilities Matching Outcomes
All offspring are black A. ww x ww
All Offspring are white B. Bw x ww

There is a 50% chance offspring are either black or white

 C. BB x ww
The chance of a white offspring is 25% D. Bw x Bw

2. The following question deals with the ABO blood group. Recall that A and B alleles are co-dominant over the allele O. Jill, who has type AB blood, marries Jack who has type B blood, but whose mother has type O blood. What are the genotypes of Jack, Jill, and Jack's mother?

A. Jack: B

Jill: AB

Jack's Mother: O

B. Jack: BB

Jill: AB

Jack's Mother: OB

C. Jack: BBO

Jill: ABO

Jack's Mother: OOO

D. Jack: BO

Jill: AB

Jack's Mother: OO

E. Jack: BB

Jill: AB

Jack's Mother: OO

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