NCERT Biology - MCQ Questions with Answers

21 A gene is said to be dominant, if
A It is never expressed in any condition
B It is expressed only in heterozygous
C It expresses its effect only in heterozygous state
D It is expressed both in heterozygous and heterozygous condition

Answer: Option [D]
22 Laws of segregation and dominance were given by
A Darwin
B Morgan
C Mendel
D De Vries

Answer: Option [C]
23 Segregation of alleles takes place during
A Cleavage
B Melosis
C Fertilization
D Non-disjunction

Answer: Option [B]
24 The sum of genes in a population is called
A Genotype
B Karyotype
C Gene pool
D Lethal gene

Answer: Option [C]
25 If two opposite alleles come together, one finding morphological expression masking the other, the fact is described as law of
A Inheritance
B Dominance
C Limiting factor
D Segregation

Answer: Option [B]

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