A.An individual with a new genotype is formed due to exchange of chromosome segments during crossing over in gametogenesis
B.Genotypic changes accumulates in a population resulting in its reproductive isolation from other populations
C.Variants with new phenotypes are produced due to new combination of genes during reproduced due to new combination of genes during reproduction
D.Homologous chromosomes exchanges segments during crossing over
A.Correct
B.Wrong
C.Partially wrong
D.No idea
A.Oenothera Lamarckiana is highly inconsistent hybrid species and distribution of 14 chromosomes is highly anamolous
B.Mutants often render mutants so much different from other members of species that they fall to compete and perish
C.Being random, the mutations are hardly useful in adaptability, therefore, they bring extinction of species rather than evolution
D.All of these
A.That it lacks satisfactory explanation for causes, origin and inheritance of variations in the organisms
B.That it offers no explanation for mutations which often bring useful or harmful variations
C.That the concept covers evolutionary development of solitary structures only but not of sets of coordinated structures
D.All of these
A.Struggle for existence
B.Survival of the fittest
C.Inheritance of acquired characters
D.Cells come from pre-existing cells
A.Acquired characters
B.Mutations
C.General characters of a species
D.Non-exxential features
A.Survival of fittest
B.Continuity of germplasm
C.Inheritance of acquired characters
D.Descent with modifications
A.Snakes lost their limbs due to burrowing mode of life
B.Neck and fore limbs of African giraffe use for generations
C.Vestigial organs were functional ones but now undergone degeneration due to loss of their function
D.Blacksmith’s son does not have powerful arm muscles as his father
A.Gene mutation
B.Mutations
C.Sexual selection
D.Sontaneous creation
A.Variation
B.Sports
C.Phenotype
D.None of these
