In the male heterogametic type of sex determination:

In $Bonellia$,all larvae are genetically and cellularly identical. The male individual lives in the uterus of the female. If a larva settles near the proboscis of an adult female,it develops into a male. If the larva develops freely in the water,it develops into a.....

The sex of the offspring,whether it will be male or female,is determined by which of the following?

$A$ gene located on the $Y$-chromosome is inherited from father to son; this is known as:

In terms of chromosomes,females produce $.......$ type of ova,while males produce $.......$ types of sperms.

Describe the haplo-diploid sex determination system.