Class 10 Science Biology Heredity and Evolution
An organism with two identical alleles of a gene in a cell is called
(a)
Homozygous
(b)
Dominant
(c)
Heterozygous
(d)
Recessive
Correct answer: (a) 
Solution: If an organism has two copies of the same allele, for example, AA or aa, it is homozygous for that trait. If the organism has one copy of two different alleles, for example, Aa, it is a heterozygous.

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components of food
why do we fall ill
heredity and evolution
diversity in living organism
heredity and evolutio