Q. When one sex chromosome is lacking in female and males are homogametic, in that condition, the sex chromosomal representation is
A) ZO-ZZ
B) XY-XX
C) XX-XO
D) ZW-ZZ
Explanation
ZO and ZZ type of sex determination. This mechanism occurs in certain buttterfiles and moths. The female is heterogametic and produces two types of eggs half with Z and half without Z-chromosome. The males have homomorphic sex chromosomes and is homogametic. It forms only one kind of sperms, each with Z-chromosome Parents Phenotypes Male Female Genotypes AA + ZZ AA +ZO Gametes A+Z, A+Z A +Z, A+O F1-generation ZO-ZZ type of sex determination
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.