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Class 12 Biology
Principles Of Inheritance And Variation
Quiz 1
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Sucess of mendal is
0%
Selection of Peaplant
0%
Studied of free characters
0%
More Characters selection
0%
Pea is Bisexual
Explanation
Selection of Peaplant
Loss of Melanin pigment cause for:
0%
Colourblindness
0%
Depigmentation
0%
Phenyl Ketoneuria
0%
Alkaptoneuria
Explanation
Depigmentation
Gunetical identification of male human is:
0%
By Nucleus
0%
By cells
0%
By Autosome
0%
By Sex-chromosome
Explanation
By Sex-chromosome
Rh
0%
rr
0%
TT
0%
Rr
0%
Both (a) and (c)
Explanation
Rr
Cause of chromosomal mutation:
0%
Euploidy
0%
Polyploidy
0%
Physical effect
0%
All of these
Explanation
All of these
Mendal was born in:
0%
17th century
0%
18th century
0%
19th century
0%
8th century
Explanation
17th century
Two genes very close on a chromosome will show:
0%
No crossing over
0%
High crossing over
0%
Hardly an crossing over
0%
Only double crossing overy
Explanation
No crossing over
First geneticist/father of genetics was:
0%
de Vries
0%
Mendel
0%
Darwin
0%
Morgan
Explanation
Mendel
An lndividual with into identical alleles is:
0%
Hybrid
0%
Dominant
0%
Homozygous
0%
Heterozygous
Explanation
Homozygous
Mendal’s law can be applicable only when:
0%
Characters are linked
0%
Parents are pore breed
0%
F
0%
Onepair of contiasting characters depends on another pair
Explanation
Characters are linked
A true hybrid condition is:
0%
tt Rr
0%
Tt rr
0%
tt rr
0%
Tt Rr
Explanation
tt rr
The allele which is unable to express its effect in the presence of another is called :
0%
Co-dominant
0%
Supplementary
0%
Complementary
0%
Recessive
Explanation
Recessive
Most of the mutations are:
0%
Recessive
0%
Harmful
0%
Germinal
0%
All of these
Explanation
Recessive
Smallest segment of genetic material affected by mutation is :
0%
Recon
0%
Cistron
0%
Muton
0%
Exon
Explanation
Muton
Genes located on V-chroinosome are:
0%
Mutant genes
0%
Autosomal genes
0%
Holandric genes
0%
Sex-linked genes
Explanation
Sex-linked genes
A strong mutagen is:
0%
Cold
0%
Heat
0%
Water
0%
X-rays
Explanation
X-rays
A point mutation is:
0%
Thalassemia
0%
Sickel-cell anaemia
0%
Down’s syndrome
0%
Nightblindness
Explanation
Sickel-cell anaemia
Mendel’s second law is of the law of:
0%
Segregation
0%
Dominance
0%
Polygenic inheritance
0%
Independent assortment
Explanation
Independent assortment
An organism with two unlike genes of a trait is called :
0%
Homozygous
0%
Hetrozygous
0%
Both of these
0%
None of these
Explanation
Hetrozygous
Mendel’s laws were discovered by:
0%
Correns
0%
Shermak
0%
de meris
0%
All of these
Explanation
All of these
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