In a dihybrid cross, if you get $9: 3: 3: 1$ ratio it denotes that
the alleles of two genes are interacting with each other
it is a multigenic inheritance
it is a case of multiple allelism
the alleles of two genes are segregating independently
Which of the following will not result in variations among siblings?
Independent assortment of genes
Crossing over
Linkage
Mutation
Mendel's law of independent assortment holds good for genes situated on the
non-homologous chromosomes
homologous chromosomes
extra nuclear genetic element
same chromosome
Occasionally, a single gene may express more than one effect. The phenomenon is called
multiple allelism
mosaicism
pleiotropy
polygeny
In a certain taxon of insects some have 17 chromosomes and the others have 18 chromosomes. The 17 and 18 chromosome-bearing organisms are
males and females, respectively
females and males, respectively
all males
all females