Question

Give the sex of the following Drosophila assuming that the autosomes are present in the normal

number. XO; XY; XXY. Answers are in order (respectively).
A) male; male; female
B) female; male; male
C) female; male; female
D) male; male; male

Answer 1

In Drosophila, XO results in a male, XY is also a male, and XXY is a female. The correct answer is Male; Male; Female.

Step-by-step explanation:

The question is about determining the sex of Drosophila (fruit flies) based on different combinations of their sex chromosomes (X and Y). In Drosophila, similar to humans, males are typically XY and females are XX. Therefore, for the combinations given:

• XO would result in a male because of the presence of a single X chromosome with the absence of the second sex chromosome (O stands for a missing sex chromosome).
• XY follows the standard male genotype.
• XXY contains two X chromosomes, which would result in a female phenotype.

Therefore, the answers in order are: A) male; B) male; C) female. The correct sequence for XO; XY; XXY is: A) Male; B) Male; C) Female.