Question
Biology Question on Principles of Inheritance and Variation
Which of the following conditions correctly describes the manner of determining the sex in the given example ?
A
Homozygous sex chromosomes (XX) produce male in Drosophila
B
XO type of sex chromosomes determine male sex in grasshopper
C
Homozygous sex chromosomes (ZZ) determine female sex in Birds
D
XO condition in humans as found in Turner Syndrome, determines female sex
Answer
XO type of sex chromosomes determine male sex in grasshopper
Explanation
Solution
Homozygous sex chromosome XX produces female in Drosophila. Homozygous sex chromosome ZZ determines male sex in birds and some reptiles. In Klinefelter?? syndrome there is trisomy of sex chromosome, 44 + XXY.