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
The inheritance pattern of a gene over generations among humans is studied by the pedigree analysis. Character studied in the pedigree analysis is equivalent to
quantitative trait
Mendelian trait
polygenic trait
maternal trait
It is said that Mendel proposed that the factor controlling any character is discrete and independent. This proposition was based on the
observations that the offspring of a cross made between the plants having two contrasting characters shows only one character without any blending
self-pollination of $F_1$ offsprings
cross-pollination of $F_1$-generation with recessive parent
Two genes ' $A$ ' and ' $B$ ' are linked. In a dihybrid cross involving these two genes, the $F_1$ heterozygote is crossed with homozygous recessive parental type (aa bb ). What would be the ratio of offspring in the next generation?
$1: 1: 1: 1$
$9: 3: 3: 1$
$3: 1$
$1: 1$