Question

explain in brief the basic three (3) laws of Mendelian Inheritance with an example?

Answer 1

The laws of Mendelian inheritance are :

a) Law Of Dominance : This law states that in an individual the factors present,one will be dominant over the other or both are recessive

Example : When a pure breeding tall plant and a short plant is crossed ,only the tall phenotype is expressed in the first generation progeny,which shows the dominance of the allele of the tall phenotype.

b) Law Of independent assortment : It states that when alleles of two different genes are passed on to the gametes they sort themselves independent one another

Example :In a dihyvrid cross of seeds with round shape and green color and a plant of wrinkled seeds and yellow color.The progeny is likely to have green color and wrinkled seeds or yellow color and round seeds showing that both the alleles for traits segregated independently

c) Law Of segregation :This law states that each individual consists a pair of alleles and they segregate into gametes

Example : For a heterozygous trait ;Gg the alleles segregate such that each gametes gets one copy

So one gamete will carry G for the trait and the other g for the trait