byjus.com › ncert-solutions-class-10-scienceNCERT Solutions for Class 10 Science Chapter 9 Heredity and ... Females have two sets of X-chromosomes while males have 1 X-chromosome and 1 Y-chromosome. During the process of reproduction, fertilization takes place, where the male gamete fuses with the female gamete and it results in the formation of a diploid zygote. Furthermore, the zygote receives an equal contribution of genetic material from both ...