Read the following statements carefully: (A) In the XX-XO type of sex determination, males have one chromosome less than females. (B) In birds, females are heterogametic and produce two different types of gametes. (C) Turner's syndrome is an example of aneuploidy resulting in a karyotype of 45 chromosomes. (D) Drosophila exhibits female heterogamety, producing eggs with either X or Y chromosomes. How many of the abov

Step-by-step solution

Statement (A) is correct because in the XX-XO mechanism (e.g., grasshopper), males have only one X chromosome (XO) while females have a pair (XX), meaning males have one chromosome less. Statement (B) is correct as birds follow the ZW-ZZ mechanism where females are ZW (heterogametic) and produce two types of eggs (Z and W). Statement (C) is correct because Turner's syndrome is caused by the absence of one X chromosome, resulting in a karyotype of 45 (44 + XO). Statement (D) is incorrect because Drosophila follows t