In drosophila male there is no cross over suppression due to pericentric inversion as___________

If you cross a white eyed female drosophila with a red eyed male drosophila, what will be the colour of eyes for their male and female offspring?

A

Both red eyed

B

Both white eyed

C

Red eyed daughter and white eyed son

D

Red eyed son and white eyed daughter

In pericentric inversion, the inversion loop involves __________ strands.

A

1

B

2

C

3

D

4

As Human and Drosophila both follow XY system of sex determination, a male in human is always a male in drosophila and same is for female.

A

True

B

False

In Drosophila Crossing over in paracentric region is lethal and leads to cross-over suppression. This leads to reduction in fertility.

A

True

B

False

You cross a p+/v+ p+/v+ male drosophila to a p-/v- p-/v- and obtain the F1 hybrid. Now you cross the F1 male with double recessive female. What will be the recombination phenotype in F2?

A

p+/v+ p-/v- only

B

p+/v+ p-/v- and p-/v- p-/v-

C

p+/v+ p-/v- and p-/v- p-/v- also p+/v- p-/v- and p-/v- p-/v-

D

p+/v+ p-/v- and p-/v- p-/v- also p-/v+ p-/v- and p-/v- p-/v-

What are the results of pericentric inversion with single crossing over?

A

Two normal, one dicentric and one acentric chromosome

B

2 dicentric and 2 acentric chromosomes

C

Four normal chromosomes with centriomere in different positions

D

3 normal chromosome, one abnormal acentric chromosome

If crossing over occurs within the loop of a pericentric inversion, then the resulting chromatids have

A

A duplication and a deficiency

B

A paracentric inversion

C

A translocation

D

None of the above

Consider this sequence A—O—B —C—D—E—F, be a DNA sequence where O is the centromere. Which of the following will be a pericentric inversion?

A

A—O—B—D—E—F

B

B—O—A—D—E—F

C

D—B—O—A—E—F

D

A—O—E—D—B—F

If you cross a red eyed pure breeding female Drosophila with a white eyed male, then the F1 males so produces were crossed with white eyed male, what will be the eye colour of their daughters and sons in F2?

A

Both daughters and sons red eyed

B

Daughters with both eye colour while sons with white eye

C

Both daughters and sons with both eye colours

D

Daughters with red eye and sons with white eyes

Simplify : $${{{5 \over 3} \times {7 \over {51}}{\text{ of }}{{17} \over 5} - {1 \over 3}} \over {{2 \over 9} \times {5 \over 7}{\text{ of }}{{28} \over 5} - {2 \over 3}}}$$

A

$$\frac{1}{2}$$

B

4

C

2

D

$$\frac{1}{4}$$

In drosophila male there is no cross over suppression due to pericentric inversion as___________

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