[" Q1979.Mutation generally produces "],[[" (1) recessive genes "],[" (2) polygenes "],[" (3) lethal genes "],[" (4) dominant genes "],[" Ans: "(3)]]

A dominant lethal gene:

Dominant genes and Recessive genes

Recessive lethal genes are:

Differentiate between dominance and recessive genes.

Whether the haemophilic gene is dominant or recessive ?

How do mendel's experiments show that gene may be dominant or recessive?

Match the following {:("Gene interactions",F_2 "Phenotype ratio"),("(A) Complementary genes",(i) 1:2:1),("(B) Supplementary genes",(ii) 9 : 7),("(C) Co - dominance ",(iii) 15 :1),("(D) Duplicate genes",(iv) 9 :3:4):}

Which of the following most appropriately describes haemophilia? (A) X-linked recessive gene disorder (B) Chromosomal disorder (C) Dominant gene disorder (D) Recessive gene disorder

When a single gene produces two effects and one of it is lethal then the ratio is ...............