The physical characteristics of an organism can be observed through its:

Identify the correct and incorrect statements from the following:
$(1)$ Mendel is considered the father of modern genetics.
$(2)$ Down's syndrome is a sex-linked chromosomal disorder.
$(3)$ Sickle cell anemia is an example of point mutation.
$(4)$ Color blindness is a hereditary trait.
$(5)$ Triploid female flies are found in Drosophila.

Which of the following variations are temporary and have nothing to do with the last or next generation?

Consider the following statements regarding the $ABO$ blood group in humans:
$I.$ It is controlled by multiple alleles.
$II.$ It shows codominance.
$III.$ Codominance can be manifested phenotypically in humans.
$IV.$ It follows Mendel's law of inheritance.
Which of the following statement$(s)$ are correct?

If a modified allele produces a non-functional enzyme or no enzyme,then the phenotype will not be affected in which of the following cases?

$A$ gene which suppresses the activity of another gene but does not lie on the same locus is called: