Question

When heterozygous tall plants are self-pollinated than tall and dwarf plants are obtained, this is explain to [RPMT 1999]
A) Law of purity of gamete
B) Segregation of law
C) Division in spores
D) Independent assortment

Answer 1

Answer:

B) Law of Segregation

Explanation:

One allele is allotted to each gamete in gamete formation.

This is the law of segregation of gametes proposed by Mendel.

Each gamete has two genes. However, these genes split and so do the gametes. Hence, one gamete contains only one gene.

Now, according to the question when a heterozygous tall plant (Tt) is self-pollinated then both tall and dwarf plants are obtained.

If two heterozygous tall plants are crossed then the gametes will be (T) and (t). The offspring will be homozygous tall (TT), heterozygous tall (Tt), heterozygous tall (Tt), and homozygous dwarf (tt).

Hence, it is clear that the gametes contained only one gene. Thus being in accordance with the law of segregation.

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Answer 2

Answer:

b) Law of segregation

Explanation:

When heterozygous tall plants (Tt) are self-pollinated, then tall and dwarf plants are obtained within the ratio of 3 : 1 . It shows the law of segregation. It's also called the primary law of inheritance. The law of segregation states that:

‘‘The two copies of every genetic factor segregate during the event of gametes, to make sure that every parent’s offspring attains one factor.’’

OR

‘‘During the event of the gamete, each gene is segregated in such how that the gamete consists of only 1 allele for that gene.’’

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