PLEASE help as soon as possible! This quiz is due soon and I really need help. T

Question

PLEASE help as soon as possible! This quiz is due soon and I really need help. Thank you!
QUESTION 1
The normal eye color of Drosophila is red, but strains in which all flies have brown eyes are available. Similarly, wings are normally long, but there are strains with short wings. A female from a pure line with brown eyes and short wings is crossed with a male from a normal pure line. The F1 consists of normal females and short-winged males. An F2 is then produced by intercrossing the F1. Both sexes of F2 flies show phenotypes in the Table below. How many females and males, respectively, have the same genotypes as the parental genotypes? The ratios are within the sexes, eg., 1/2 of the females.
3/8 red eyes, long wings 3/8 red eyes, short wings 1/8 brown eyes, long wings 1/8 brown eyes, short wings

A. females 1/6; males 1/16
B. females 1/8; males 1/16
C. females 1/16; males 1/8
D. females 1/8; males 1/8
E. females 1/8; males 1/4
F. females 1/4; males 1/8
G. females 1/4; maless 1/4
H. females 1/4; males 1/2


QUESTION 2
The normal eye color of Drosophila is red, but strains in which all flies have brown eyes are available. Similarly, wings are normally long, but there are strains with short wings. A female from a pure line with brown eyes and short wings is crossed with a male from a normal pure line. The F1 consists of normal females and short-winged males. An F2 is then produced by intercrossing the F1. Both sexes of F2 flies show phenotypes as in the Table below Which of these phenotypes are dominant?
3/8 red eyes, long wings 3/8 red eyes, short wings 1/8 brown eyes, long wings 1/8 brown eyes, short wings
A. red eyes and short wings are dominant
B. red eyes and long wings are dominant
C. brown eyes and short wings are dominant
D. brown eyes and long wings are dominant
E. brown eyes and red eyes are dominant PLEASE help as soon as possible! This quiz is due soon and I really need help. Thank you!
QUESTION 1
The normal eye color of Drosophila is red, but strains in which all flies have brown eyes are available. Similarly, wings are normally long, but there are strains with short wings. A female from a pure line with brown eyes and short wings is crossed with a male from a normal pure line. The F1 consists of normal females and short-winged males. An F2 is then produced by intercrossing the F1. Both sexes of F2 flies show phenotypes in the Table below. How many females and males, respectively, have the same genotypes as the parental genotypes? The ratios are within the sexes, eg., 1/2 of the females.
3/8 red eyes, long wings 3/8 red eyes, short wings 1/8 brown eyes, long wings 1/8 brown eyes, short wings

A. females 1/6; males 1/16
B. females 1/8; males 1/16
C. females 1/16; males 1/8
D. females 1/8; males 1/8
E. females 1/8; males 1/4
F. females 1/4; males 1/8
G. females 1/4; maless 1/4
H. females 1/4; males 1/2


QUESTION 2
The normal eye color of Drosophila is red, but strains in which all flies have brown eyes are available. Similarly, wings are normally long, but there are strains with short wings. A female from a pure line with brown eyes and short wings is crossed with a male from a normal pure line. The F1 consists of normal females and short-winged males. An F2 is then produced by intercrossing the F1. Both sexes of F2 flies show phenotypes as in the Table below Which of these phenotypes are dominant?
3/8 red eyes, long wings 3/8 red eyes, short wings 1/8 brown eyes, long wings 1/8 brown eyes, short wings
A. red eyes and short wings are dominant
B. red eyes and long wings are dominant
C. brown eyes and short wings are dominant
D. brown eyes and long wings are dominant
E. brown eyes and red eyes are dominant PLEASE help as soon as possible! This quiz is due soon and I really need help. Thank you!
QUESTION 1
The normal eye color of Drosophila is red, but strains in which all flies have brown eyes are available. Similarly, wings are normally long, but there are strains with short wings. A female from a pure line with brown eyes and short wings is crossed with a male from a normal pure line. The F1 consists of normal females and short-winged males. An F2 is then produced by intercrossing the F1. Both sexes of F2 flies show phenotypes in the Table below. How many females and males, respectively, have the same genotypes as the parental genotypes? The ratios are within the sexes, eg., 1/2 of the females.
3/8 red eyes, long wings 3/8 red eyes, short wings 1/8 brown eyes, long wings 1/8 brown eyes, short wings

A. females 1/6; males 1/16
B. females 1/8; males 1/16
C. females 1/16; males 1/8
D. females 1/8; males 1/8
E. females 1/8; males 1/4
F. females 1/4; males 1/8
G. females 1/4; maless 1/4
H. females 1/4; males 1/2


QUESTION 2
The normal eye color of Drosophila is red, but strains in which all flies have brown eyes are available. Similarly, wings are normally long, but there are strains with short wings. A female from a pure line with brown eyes and short wings is crossed with a male from a normal pure line. The F1 consists of normal females and short-winged males. An F2 is then produced by intercrossing the F1. Both sexes of F2 flies show phenotypes as in the Table below Which of these phenotypes are dominant?
3/8 red eyes, long wings 3/8 red eyes, short wings 1/8 brown eyes, long wings 1/8 brown eyes, short wings
A. red eyes and short wings are dominant
B. red eyes and long wings are dominant
C. brown eyes and short wings are dominant
D. brown eyes and long wings are dominant
E. brown eyes and red eyes are dominant

Explanation / Answer

Answer:

Question 1:

D. females 1/8; males 1/8

Explanation:

Red: R

Brown: r

Ling wings : L

Short wings:l

Normal phenotype = Red eye & long wing

Based on the information, eye color gene is autosomal linked and wing size gene is X-linked.

Brown eyes & short wing (rr; Xl Xl) x Red eyes & long wings (RR; XLY)---P1

R; XL

R;Y

r; Xl

Rr; XL Xl (normal female)

Rr; Xl Y (red eye & short wing male)

Rr; XL Xl (normal female) x (red eye & short wing male) Rr; Xl Y-----F1 x F1

R; XL

r; Xl

R; Y

r; Y

R; XL

RR; XL XL (normal female)

Rr; XL Xl (normal female)

RR; XL Y (normal male)

Rr; XL Y (normal male)

R; Xl

RR; XL Xl (normal female)

Rr; Xl Xl (Red eyed & short winged female)

RR; Xl Y (short winged male)

Rr; Xl Y (Red eyed & short winged male)

r; XL

Rr; XL XL (normal female)

rr; XL Xl (brown eyed & long winged female)

Rr; XL Y (normal male)

rr; XL Y (brown eyed & long winged male)

r; Xl

Rr; XL Xl (normal female)

rr; Xl Xl (brown eyed & short winged female)

Rr; Xl Y (short winged male)

rr; Xl Y (brown eyed & short winged male)

Parental female genotype = rr ; Xl Xl

1/8 of female progeny are identical to their female parent.

Parental male genotype = RR ; XL Y

1/8 of male progeny are identical to their male parent.

Question 2:

B. red eyes and long wings are dominant

R; XL

R;Y

r; Xl

Rr; XL Xl (normal female)

Rr; Xl Y (red eye & short wing male)

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