Heredity and evolution Worksheet-11
C. Independent assortment
D. Incomplete dominance
A. Traits are controlled by genes
B. Traits are controlled by hormones
C. Enzymes control characters
D. Traits get expressed by plant part
A. He gave theory of natural selection in his book 'The Origin of Species'
B. Darwin studied the role of earthworms in soil fertility
C. Darwin's natural selection theory is based on survival of the fittest
D. All of these
(i) Pea plants possess a number of well defined contrasting characters.
(ii) Pea plants contain unisexual flowers.
(iii) Pea plants have perfect bisexual flowers.
(iv) These are annual plants.
A. (i) & (iv) B. (i) & (ii)
C. (i) & (iii) D. (i),(iii)&(iv)
A. A male has one X chromosome and one Y chromosome
B. A female has two X chromosomes but no Y chromosome
C. Males have a mismatched pair of sex-chromosomes in which Y is normal sized while X is a short one
D. Males have a mismatched pair of sex-chromosomes in which Y is short one and X is normal sized
A. A random change in gene frequencies from one generation to the next
B. A change in an allele due to alteration in the DNA molecule
C. A change in gene frequencies due to exchange of genes between different populations
D. A product of natural selection
A. Gene flow B. Natural selection
C. Genetic drift D. None of these
A. Genetic load B. Selection
C. Gene flow D. Adaptation
A. It is a process in which members of a population inherit traits that enable them to better survive and produce offspring
B. It is based on the isolation of natural populations and selective breeding of organisms
C. It provides diversity without any adaptation
D. All of these
A. Hugo deVries B. Karl Correns
C. Enrich von Tshermak D. All of these