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प्रश्न
According to the evolutionary theory, formation of a new species is generally due to
विकल्प
sudden creation by nature
accumulation of variations over several generations
clones formed during asexual reproduction
movement of individuals from one habitat to another
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उत्तर
accumulation of variations over several generations
Explanation -
According to the evolutionary theory, the accumulation of variations (resulting from errors in DNA copying and sexual reproduction) over several generations along with the operation of natural selection leads to the formation of new species.
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संबंधित प्रश्न
Two heterozygous parents are crossed. If the two loci are linked, what would be the distribution of phenotypic features in the F1 generation for a dihybrid cross?
Give Technical Term:
The ratio of offspring on F2 generation in a dihybrid cross.
Complete the following sentence with appropriate word:
A character that is suppressed is _________.
Explain with an example the inheritance of the dihybrid cross. How is it different from monohybrid cross?
Test cross involves
The genotype of a plant showing the dominant phenotype can be determined by
Select the period for Mendel’s hybridization experiments
A cross between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?
Mendel’s last law is ______.
In a dihybrid cross AABB x aabb, F2 progeny of AABB, AABb, AaBB and AaBb occurs in the ratio of ______.
Two genes ‘A’ and ‘B’ are linked. In a dihybrid cross involving these two genes, the F1 heterozygote is crossed with homozygous recessive parental type (aa bb). What would be the ratio of offspring in the next generation?
In the F2 generation of a Mendelian dihybrid cross the number of phenotypes and genotypes are ______.
What is the difference between genetic drift and change due to natural selection?
Which one of the following genetic ratios will be obtained in a dihybrid test cross:
Independent assortment means:
Mendel's law of independent assortment is based on F2 ratio of:
Describe the dihybrid cross upto F2 generation as conducted by Gregor Mendel using pure lines of Garden Pea for characters-seed shape and seed colour.
