Q1
The genotypic ratio of a monohybrid cross in F2 is:
📝 SolutionThe F2 genotypic ratio is 1 homozygous dominant : 2 heterozygous : 1 homozygous recessive, i.e. 1:2:1.
Q2
The phenotypic ratio of a dihybrid cross in F2 is:
📝 SolutionA dihybrid cross gives a 9:3:3:1 phenotypic ratio in the F2 generation.
Q3
Alleles are:
📝 SolutionAlleles are alternative forms of a gene occupying the same locus on homologous chromosomes.
Q4
An organism with two identical alleles for a trait is:
📝 SolutionA homozygous organism has two identical alleles for a given gene (e.g. TT or tt).
Q5
The law of segregation states that alleles:
📝 SolutionMendel's law of segregation states that the two alleles of a gene separate during gamete formation, so each gamete gets only one.
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Class 12 · Biology
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