The males of grasshoppers and moths possess two sets of autosomes and:

In Barr body (sex-chromatin) of a normal female:

Example$(s)$ of environmental determination of sex is/are:

Given below are two statements.
Statement $I$: The queen of honey bee develops by way of parthenogenesis.
Statement $II$: In honey bees,all diploid zygotes develop into males.
In light of the above statements,select the correct answer from the options given below.

Barr body in mammals represents

$A$ family has five girls and no boys. What is the probability of having a boy as the sixth child?