Question

The cytological observations made in a number of insects led to the
development of the concept of genetic/chromosomal basis of
sex-determination mechanism. Honey bee is an interesting example to
study the mechanism of sex-determination. Study the schematic cross
between the male and the female honey bees given below and answer the
questions that follow :
Parent Female honey bee
32 chromosomes
Male honey bee
14
В
Gametes
Gametes
Fertilisation
Offspring
Male honey bee Female honey bee
32 chromosomes​

Answer 1

Explanation:

In honey bees, the male is haploid while the female is diploid. Haplodiploidy occurs in some insects like bees, ants and wasps. Male insects are haploid because they develop partheno-genetically from unfertilized eggs. The phenomenon is called arehenotoky. Meiosis does not occur during the formation of sperms. Females grow from fertilized eggs and are hence diploid. Queen bee picks up all the sperms from the drone during nuptial flight and stores the same in her seminal vesicle. Formation of worker bees(diploid females) and drones(haploid males) depends upon the brood cells visited by the queen. While visiting the smaller brood cells, the queen emits sperms from its seminal receptacle after laying the eggs. Males are normally fertile haploids due to development from unfertilized eggs. Occasionally diploid infertile males are also produced from heterozygous females through fertilization.

❤❤❤❤❤

Answer 2

Sex-determination system in the honey bee.

• In honey bees, the female is diploid that is they contain 2n number of chromosomes whereas the male is haploid and contains n number of chromosomes.
• Female bees are diploid because they grow from fertilized eggs whereas the male is formed parthenogenetically from unfertilized eggs therefore meiosis does not occur during the formation of sperm.
• The worker bees are the diploid female and the drones are the haploid male.
• The cross between the male (n=16) and female (2n=32) gametes from the female bees is n=16 they form haploid males which are unfertilized eggs this process is called parthenogenetically and diploid females are formed from fertilized eggs.

#SPJ3