Question

State True or False : 1×2=2

i) The sex chromosome pair in the ovum is actually responsible for
sex determination in human.

ii) Duck billed Platypus is an egg laying mammal.​

Answer 1

Answer:

sex chromosome is a chromosome that differs from an ordinary autosome in form, size, and behavior. The human sex chromosomes, a typical pair of mammal allosomes, ... The X ...

Answer 2

Answer:

Explanation:

i)False.Sex chromosome pair in females is XX and that in males is XY.At the time of gamete formation,only one of the sex chromosome passes to the gametes;that is one X to ovum and either X or Y to the sperm.Hence there are 2 types of sperms produced and thus sex of the baby is determined by sperm not ovum

ii)True.The platypus, sometimes referred to as the duck-billed platypus, is a semiaquatic egg-laying mammal endemic to eastern Australia, including Tasmania. The platypus is the sole living representative of its family and genus, though a number of related species appear in the fossil record.