Question

Haplodiploidy is found in
A)Grasshoppers and cockroaches
B)Birds and reptiles
C)Butterflies and moths
D)Honey Bees, ants and wasps

Answer 1

Hint: Sex determination system in which unfertilized eggs develop into males and fertilized eggs develop into females is termed as haplodiploidy. Males are haploid whereas females are diploid. Males have half the number of chromosomes than females. Males do not have father and sons but can have grandfather and grandsons

Complete answer:
Haplodiploidy is found in honeybees, ants and wasps
In honey bees, the queen bee is diploid and has 32 chromosomes while males are haploid and are parthenogenetically produced from unfertilized eggs. Worker bees are diploid females produced from fertilized eggs. Sperms released by male drones are taken by queen bees during nuptial flight and are stored in the seminal vesicle and these sperms are emitted by queen bee after laying of eggs and after fertilization, diploid worker bees are produced.

Hence option D) is correct Honeybees, ants and wasps are correct.
Option A) is incorrect In grasshoppers and cockroaches, XX-XO type of sex determination is present.XO type is male and males are heterogametic and produce two types of a sperm cell with the X chromosome and other without X chromosome while females are homogametic that produces germ cells with X chromosomes.
Option B) is incorrect In birds and reptiles, ZZ-ZW type of sex determination is present Females are heterogametic ( ZW ) while males are homogametic. Another type of sex determination is also found in reptiles i.e temperature-dependent sex determination. High or low temperatures lead to male eggs and medium temperature leads to female eggs.
Option C) is incorrect In Butterfly and moth ZZ-ZW type of sex determination. Females are heterogametic ( ZW) and males are homogametic ( ZZ).

Hence, the correct answer is option (D)

Note: Haplodiploidy occurs in honeybees, ants and wasps in which unfertilized eggs develop into males and fertilized eggs develop into females. Grasshoppers and cockroaches have XX-XO type of sex determination. Birds and reptiles have ZZ-ZW type of sex determination. Butterflies and moths also have ZZ-ZW type of sex determination.