Q.

Read the passage given below and answer the following questions from (i) to (v):

Gregor Johann Mendel is known as a “Father of modern genetics” for his work in the field of genetics. He gave three laws of inheritance followed as Law of dominance, Law of segregation and Law of independent assortment. He conducted his experiment on garden pea plants having contrasting characteristics. He performed self-pollination and cross-pollination to understand the inheritance patterns of traits.

 

(i) After cross-fertilisation of true-breeding tall and dwarf plants, the F generation was self-fertilised. The resultant plants have genotype in the ratio:

1 1:2:1 (homozygous tall: heterozygous tall: dwarf)  
2 1:2:1 (heterozygous tall: homozygous tall: dwarf)  
3 3:1 (tall: dwarf)  
4 3:1 (dwarf: tall)  

Ans.

(1)