Match the following:
Column $- I$ | Column $- II$ |
$(1)$ Inheritance of two genes | $(a)\; ABO$ blood group |
$(2)$ Incomplete dominance | $(b)\; 1:2:1$ |
$(3)$ Codominance | $(c)\;9:3:3:1$ |
$(4)$ Inheritance of one gene | $(d)\; 3:1$ |
$(1-c),(2-a),(3-b),(4-d)$
$(1-c),(2-b),(3-d),(4-a)$
$(1-c),(2-b),(3-a), (4-d)$
$(1-c),(2-d),(3-a),(4-b)$
Select the correct statement:
Match the terms in column $I$ with their description in column $II$ and choose the correct option.
Column $-I$ | Column $-II$ |
$(A)$ Dominance | $(i)$ Many genesgovern a single character |
$(B)$ Codominance | $(ii)$ In a heterozygousorganism only one allele expresses itself |
$(C)$ Pleiotropy | $(iii)$ In a heterozygousorganism both alleles express themselves fully |
$(D)$ Polygenic | $(iv)$ A single gene inheritanceinfluences many characters |
Pick out the correct statements.
$(1)$ Haemophilia is a sexlinked recessive disease.
$(2)$ Down’s syndrome is due to aneuploidy.
$(3)$ Phenylketonuria is an autosomal recessive gene disorder.
$(4)$ Sickle cell anaemia is an $X$-linked recessive gene disorder.
Match the following columns.
Column $- I$ | Column $- II$ |
$(w)$ Blood group | $(a)$ Polygenic inheritance |
$(x)$ Skin colour | $(b)$ Aneuploidy |
$(y)$ Mendelian disorder | $(c)$ Incomplete dominance |
$(z)$ Chromosomal disorder | $(d)$ Sickle-cell anaemia |
$(e)$ Co-dominance |
Which of the following pairs is $wrongly$ matched?