Principles Of Inheritance And Variation

The correct answer is option (B): (2n-1)
The cause of Turner's syndrome is monosomy (2n - 1). It happens when a normal egg and an allosperm-free sperm (22 + 0) or a normal egg and a normal X sperm combine. The lack of X chromosomes in females results in Turner syndrome, the most prevalent kind of female genetic illness, which has an XO genotype. These girls are infertile and have undeveloped breasts, tiny uteri, and underdeveloped ovaries. They have a wide chest and a webbed neck. Instead of 46 chromosomes, the person has 2n = 45 (44 + XO).