Advertisements
Advertisements
प्रश्न
Explain how, characteristics (or traits) are inherited through genes.
उत्तर
Genes are responsible for the characteristic features of an organism. The characteristics or traits of parents are transmitted to their progeny through genes present on their chromosomes during the process of sexual recombination. There is a pair of genes for each characteristic of an organism. However, each parent passes only one of the two genes of the pair for each characteristic to its progeny through gametes. Thus, the male gamete and female gamete carry one gene for each characteristic form the gene pairs of parents. But when a male gamete fuses with a female gamete during fertilisation, they make a new cell called zygot,e with a full set of genes. This zygote grows and develops to form a new organism having characteristics from both the parents.
APPEARS IN
संबंधित प्रश्न
According to de-Vries what is saltation?
List three distinguishing features, in tabular form, between acquired traits and the inherited traits.
"We cannot pass on to our progeny the experiences and qualifications earned during our life time". Justify the statement giving reason and examples.
Why are the small numbers of surviving tigers a cause of worry from the point of view of genetics?
Give any two distinctive features of Dryopithecus.
Which of the following gas was not present in early earth atmosphere?
(a) Ammonia
(b) Oxygen
(c) Hydrogen sulphide
(d) Methane
State the meaning of inherited traits and acquired traits. Which of the two is not passes on the next generation? Explain with the help of an example.
Read the following statement and justify same in your own words with the help of suitable example.
Human evolution began approximately 7 crore years ago.
Explain the following :
(a) Speciation
(b) Natural Selection
Had Darwin been aware of Mendel’s work, would he been able to explain the origin of variations. Discuss.