The organisms phenotypically similar but genotypically different are said to be
multizygous
homozygous
heterozygous
monozygous
How many pairs of contrasting characters of pea were selected by Mendel for cross fertilization?
Six
Seven
Five
Twelve
A couple has seven daughters, possibility of having a male child now will be (after pregnancy)
25%
50%
100%
0%
Genetic information is carried out by long chain of molecules made up of
enzymes
DNA
amino acids
proteins
The wings of bat, locust and pigeon are the examples of
vestigial organs
analogous organs
homologous organs
exoskeletal structures
Which of the following is a single living species of genus Homo?
habilis
sapiens
erectus
neanderthalensis
How does speciation occur ?
by mutation
by reproductive isolation
by natural selection
by independent assortment
Genetic variation arises by
nucleolus
mutation
recombination
both '2' and '3'
Male human is represented by sex chromosomes.
XY
XX
YY
XYY
The recessive character in Mendel's pea plant was
yellow pod
round seed
green pod
axial flower