Generally it is observed that human males suffer from hemophilia more than human females, who rarely suffer from it. Explain giving reasons.

OR

F1 progeny of pea plant bearing violet flowers and snapdragon plant bearing red flowers were selfed to produce their respective F2 progeny. Compare the phenotypes, the genotypes and the pattern of inheritance of their respective F2 progeny.

Hemophilia is an X-linked recessive disorder. Human females are usually carriers of hemophilia. Sons are affected from carrier mother or affected mothers. For females to be affected, the father should be hemophilic and mother should be a carrier. A heamophilic male usually does not survive till puberty.
OR

In F1 generation,
Violet flowers in pea plant Ww X Ww
 

Phenotypic ratio: Violet: Red = 3:1

Genotype: 1:2:1
Pattern of inheritance: Mendel Law of inheritance
F1 generation: WW X WW
 

All flowers are purple in colour.
All share same genotypic ratio
Pattern of inheritance: Complete dominance
F1 generation RR X RR
 

All flowers are red in colour
All share same genotypic ratio
Pattern of inheritance: Complete dominance