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Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Bihar BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation2 Marks
Question
Homozygous and Hetrozygous.
✓

Answer

Differences between homozygous and heterozygous individuals:
 
Homozygous
Heterozygous
1
They have similar alleles (TT or tt) for a trait.
Have dissimilar alleles (Tt) for a trait.
2
Contains either dominant (TT) or recessive (tt) alleles but not both types (Tt).
Contains both-dominant and recessive alleles (Tt).
3
They are true breeding for a specific trait and produce progeny having same genotypes and phenotypes on selfing
They are not true breeding and produce offspring having three genotypes and mostly two or time three phenotypes.
4
Only one type of gametes are formed either 'T' or 't' type only, not both.
Produce two types of gametes containing 'T' as well as 't'.

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