When a plant of $F_1$ generation is crossed with homozygous dominant parents,it is known as

Which of the following is $NOT$ true for $Drosophila$ $melanogaster$?

When two genetic loci produce identical phenotypes in $cis$ as well as in $trans$ position,they are considered to be

Match List-$I$ with List-$II$ :

List-$I$ (Type of Inheritance)	List-$II$ (Example)
$A$. Incomplete dominance	$I$. Blood groups in human
$B$. Co-dominance	$II$. Flower colour in Antirrhinum
$C$. Pleiotropy	$III$. Skin colour in human
$D$. Polygenic inheritance	$IV$. Phenylketonuria

Choose the correct answer from the options given below :

How do genetic disorders arise? Explain by giving suitable examples.

State how many of the given statements are correct.
$(1)$ In a dihybrid cross experiment,Mendel obtained a test cross ratio of $1:1:1:1$.
$(2)$ Coupling and repulsion were first explained by Bateson and Punnett.
$(3)$ Klinefelter syndrome is a sex-chromosomal disorder occurring in females.
$(4)$ Mendel selected $7$ pairs of contrasting traits in pea plants to explain his experiments.
$(5)$ The chromosomal theory of inheritance was first proposed by Sutton and Boveri.