Mendel described the frequency of …A… for offsprings of a single …B…
Choose the correct options for A and B to complete the given NCERT statement
A: different types of genotypes; B: monohybrid cross
A: different types of phenotypes; B: dihybrid cross
A: different types of genotypes; B: test cross
A: different types of phenotypes; B: back cross
Related Questions
Darwinian fitness can be estimated by
How long different individual in a population survive
Number of offsprings produced by different individual in population
Individual have a large size in population
Species recover after mass extinction
What was the Lamarck’s explanation for long necked giraffes?
Stretching of necks over many generation
Short neck suddenly changed into long one
Natural selection
Mutation
Mutations are considered raw materials of evolution because they
Cause death of organism
Contribute to new variations
Are stable
Random
Scientist who also came to the similar conclusions around the same time of Charles Darwin was
Alfred Wallace
Hugo de Vries
TH Morgan
Oparin and Haldane
Which of these is an example of an analogous organ?
The wing of a bird and the wing of an insect
The forelimb of a human and the forelimb of a bat
The tailbone of a human and the tail of a monkey
The gills of a fish and the lungs of a frog
Natural selection is a process in which …A… variations enables better survival and ability to …B… and leave …C… number of progeny
Choose the correct options for A, B and C to complete the given NCERT statement
A-heritable, B-reproduce, C-greater
A-non-heritable, B-reproduce, C-greater
A-non-heritable, B-reproduce, C-lesser
A-heritable, B-reproduce, C-lesser
Industrial melanism is an example of
Protective resemblance with the surroundings
Defensive adaptation of skin against ultraviolet radiations
Drug resistance
Darkening of skin due to smoke from industries
The main point of Darwin’s theory is
Variation
Natural selection
Enormous fertility
mutation
The homologous structures like the forelimbs of bats, whales, and humans suggest:
These organisms share a common ancestor.
These organisms evolved in similar environments.
These organisms have the same genetic code.
These organisms interbreed with one another.
Darwin natural selection theory’ could not explain
Retention of characters of no use or vestigial organ
Giraffe has long neck
Giraffe has long legs
Survival of the fittest
