(D) The diploid chromosome number $(2n)$ of maize $(Zea \ mays)$ is $20$.Since the question asks for the number of pairs of chromosomes,we divide the

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(D) The diploid chromosome number $(2n)$ of maize $(Zea \ mays)$ is $20$.Since the question asks for the number of pairs of chromosomes,we divide the diploid number by $2$.Number of pairs = $2n / 2 = 20 / 2 = 10$.Therefore,maize has $10$ pairs of chromosomes.

Class 12 Biology Principles of Inheritance and Variation Mix Examples- Principles of Inheritance and Variation

Easy

What is the number of chromosome pairs in maize $(Zea \ mays)$?

A
$20$
B
$12$
C
$13$
D
$10$

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Class 12

Biology Questions

Chapter

Principles of Inheritance and Variation

Subtopic

Mix Examples- Principles of Inheritance and Variation

'Eugenics' pertains to

EasyAIPMT 1990

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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 genes govern a single character

$(B)$ Codominance $(ii)$ In a heterozygous organism only one allele expresses itself

$(C)$ Pleiotropy $(iii)$ In a heterozygous organism both alleles express themselves fully

$(D)$ Polygenic inheritance $(iv)$ $A$ single gene influences many characters

Column-$I$	Column-$II$
$(A)$ Dominance	$(i)$ Many genes govern a single character
$(B)$ Codominance	$(ii)$ In a heterozygous organism only one allele expresses itself
$(C)$ Pleiotropy	$(iii)$ In a heterozygous organism both alleles express themselves fully
$(D)$ Polygenic inheritance	$(iv)$ $A$ single gene influences many characters