Question

Klinefelter syndrome (47, XXY) and Turner syndrome (45, X) are due to View Available Hint(s) O improper segregation of sex chromosomes during meiosis improper segregation of autosomes during mitosis o improper segregation of sex chromosomes during mitosis O improper segregation of autosomes during meiosis they Submit Provide Feedback

Answer 1

1.The answer is option A

The klinefelter and Turner syndrome are sex linked genetic diseases.In klinefelter syndrome,there is an extra copy of X chromosome and as a result the sex of the individual will be male but will have female sexual characters like gynecomastia,reduced musculature,infertility and small testicles and under developed secondary sexual characters.In turner syndrome,a pair of X chromosome will be missing and as a result,the female will have short stature,nin-functioning ovaries etc..

2.The answer is option B

The pseudosomal regions are the regions that are homologous in the X and Y sex chromosomes.They are involved in the process of pairing of sex chromosomes,recombination of sex chromosomes.They also plays a major role in the proper seggregation of chromosomes during meiosis.

3. The answer is optionB

Since the cell has 3 X chromosomes,the number of barr bodies will be 2

In a cell, the number of bar boies can be calculated by subtracting 1 from the total number of X chroosomes in the cell.The barr bodies are small structures that are seen densely stained in the females.It is made up of inactivated X chromosomes,which are later condensed