EXPLAIN SHOW WORK PLEASE A recessive allele d of the dancer

EXPLAIN SHOW WORK PLEASE.

A recessive allele (d) of the dancer gene in mice affects the inner ear and results in mice with balance problems and an unusual gait. You learned in class that the A gene, which is on a different chromosome, has an allele, A^Y,that is dominant for yellow coat color and recessive lethal. You cross a pure-breeding line of dancer mice that have normal coats to a strain with normal gait and yellow coats. In the resulting F1 progeny, 1/2 have yellow coats and normal gaits and 1/2 have normal coats and normal gaits
What are the possible genotypes of the yellow-coated F1 progeny? Pick all that apply:

Select one or more:

a. ddAA

b. DdAA^Y

c. DD AA^Y

d. DdA^YA^Y

e. ddA^YA^Y

f. DDAA

g. DdAA

If you cross the yellow-coated F1 brothers and sisters, in the next generationwhat proportion of the progeny will have the dancer gait and yellow coats?

Select one:

a. 1/6

b. 1/16

c. 0

d. 9/16

e. 2/3

f. 1/12

g. 1/4

h. 3/16

i. 100%

j. 3/4

Solution

recessive allele (d) of the dancer gene in mice affects the inner ear and results in mice with balance problems and an unusual gait. You learned in class that the A gene, which is on a different chromosome, has an allele, A^Y,that is dominant for yellow coat color and recessive lethal.

You cross a pure-breeding line of dancer mice that have normal coats to a strain with normal gait and yellow coats.

In the resulting F1 progeny, 1/2 have yellow coats and normal gaits and 1/2 have normal coats and normal gaits

Normal ALLELE----dominant -------D

A recessive allele -------d

========================================

A^Y,that is dominant for yellow coat color an

recessive lethal----------- A^Y

LETHAL RECESSIVE -------A^YA^Y

^{YELLOW MICE –HETEROZYGOSU ----------}A^Y A

^{=======================================}

pure-breeding line of dancer mice that have normal coats

genotype =dd AA

====================

strain with normal gait and yellow coats.

genotype =DD A^YA

CROSS    BETWEEN dd AA    X        DD A^YA

Gametes --------------- (dA)               X (D A^Y) (D A)

D A^Y

D A

(dA)              

D A^YdA            

D A dA         

What are the possible genotypes of the yellow-coated F1 progeny? Pick all that apply:

Select one or more:

a. ddAA

b. DdAA^Y -------------------answer

c. DD AA^Y

d. DdA^YA^Y

e. ddA^YA^Y

f. DDAA

g. DdAA-------------------answer

If you cross the yellow-coated F1 brothers and sisters, in the next generation what proportion of the progeny will have the dancer gait and yellow coats?

Select one:

a. 1/6

b. 1/16------answer

c. 0

d. 9/16

e. 2/3

f. 1/12

g. 1/4

h. 3/16

i. 100%

j. 3/4

yellow-coated F1 x        yellow-coated F1

D A^YdA        x      D A^YdA            

Gamete A^Yd--------------1/4

Gamete dA-------------1/4

the dancer gait and yellow coats?

Answer

=1/4 x1/4 =1/16

	D AY	D A
(dA)	D AYdA	D A dA