Class 12 NEET Biology Principles of Inheritance and Variation Questions Part 1

Sex chromosomes are those chromosomes whose presence, absence or particular form determines the sex of the individual in unisexual or dioecious organisms, e.g.,XX−XY.XY method (XX−XY) Despite differences in morphology, XY chromosomes synapse during zygotene. They have two parts, homologous and differential. Homologous regions of the two take part in synapsis.