In Mr. Kapoor,there is a pair of autosomal genes $Bb$ and a sex-linked factor $d$. What will be the proportion of $Bd$ in his sperm?

Which of the following statements are false?
$I.$ $A$ dominant allele determines the phenotype when paired with a recessive allele.
$II.$ $A$ recessive allele is weaker than a dominant allele.
$III.$ $A$ recessive allele does not show its effects when paired with a dominant allele.
$IV.$ $A$ dominant allele is always better for an organism.

Which of the following statements is correct?

If a starfish possesses six arms instead of five,what is this an example of?

Choose the correct option regarding genetic disorders and inheritance patterns.

Identify the correct match:

Scientist	Associated with
$(i)$ William Bateson	$(a)$ Rediscovered Mendel's work.
$(ii)$ $T$.$H$. Morgan	$(b)$ Discovered that genes are made of $DNA$.
$(iii)$ $O$.$T$. Avery	$(c)$ Coined the term Genetics.
$(iv)$ Hugo de Vries	$(d)$ Prepared the first genetic map.