Question

A plant with genotype RrTt will yield _ _ types of gametes.
OPTION
A.Four (RT, Rt, rT, and rt)
B.Two (Rr and Tt)
C.None
D.Two (RT, and rt)

Answer 1

Answer:

Four (RT,RT,rT and rt)

Answer 2

Answer: Option A. Four(RT, Rt, rT, and rt)

Explanation:

Law of independent assortment: Mendel's law tells us that alleles of two or more genes get sorted into gametes independently of one other.The allele of gamete receive for one gene dors not affect the other.

Here, RrTt -

      T        t

R-   RT     Rt

r-    rT       rt

This is how, four types of gametes will be yielded by RrTt genotype.

Mendel's Law of Inheritence:

1. Law of Dominance: The progeny will inherit dominant trait characterstics in the phenotype. The alleles that are unable to express are called recessive alleles. E.g.: Tall height gamete(T) is dominant over short height gamete(t) in pea plants.

2.Law of Segregation: It states that alleles segregate during the formation of gametes and re-unite randomly during fertilisation.

3.Law of Independent Assortment: It states that different genes get sorted into gametes independently of one another.  

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