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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
Explain Mendel’s dihybrid ratio with the help of any one cross.
State Mendel’s law of Independent Assortment.
Give Technical Term:
The ratio of offspring on F2 generation in a dihybrid cross.
Explain with an example the inheritance of the dihybrid cross. How is it different from monohybrid cross?
What are the reasons for Mendel’s successes in his breeding experiment?
A cross between two tall plants resulted in offspring having few dwarf plants. What would be the genotypes of both the parents?
In a testcross involving F1 dihybrid flies, more parental-type offspring were produced than the recombinant-type offspring. This indicates ______.
In a dihybrid cross, F2 phenotypic ratio is 13 : 3. It is case of ______.
Mendel’s Law of independent assortment holds good for genes situated on the ______.
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 ______.
Given below is a dihybrid cross performed on Drosophila.
Which of the following conclusions can be drawn on the basis of this cross? When yellow bodied (y), white-eyed (w) Drosophila females were hybridized with brown bodied (y+), red-eyed males (w+) and F1 progenies were intercrossed, F2 generation would have shown the following ratio:
From the list given below, select the character which can be acquired but not inherited
Do genetic combination of mothers play a significant role in determining the sex of a new born?
In the Mendelian dihybrid cross when heterozygous round yellow is self grossed, round green offsprings are represented by the genotype.
Mendel's law of independent assortment is based on F2 ratio of:
During which time period did Gregor Mendel conduct his systematic hybridisation experiments on pea plants?
What does Mendel's approach to counting and analyzing offspring demonstrate about the scientific method?
