Inheritance of One Gene
Question
How many of the following is true for a homozygous organism?
(a) It is true breeding organism.
(b) Contains a pair of identical alleles of a gene for a character or trait.
(c) Homozygous condition is not mandatory for expression of a recessive or dominant character.
Easy
Solution
Homozygous plants “breed true” because all of their gametes contain the same allele.
An organism that has a pair of identical alleles for a character is said to be homozygous for the gene controlling that character.
Homozygous condition is mandatory for expression of a recessive character whereas a dominant character can be expressed both in homozygous as well as heterozygous condition.
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