Question

An orgamism with two unlike genes of a trait is called

Answer 1

Hey friend,
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Question: An orgamism with two unlike genes of a trait is called_________
 
Solution: 

Coming to your question

Let us understand the following terms

Gene: It is basically a unit of Inheritance which is a sequence of DNA or RNA

Allele: Contrasting forms of Genes are known as allele.

Homozygous individual: when the individual has same allele for a given trait (dominant or recessive )  the individual is known as homozygous.

Heterozygous: when the individual has two different alleles for a given trait  the individual is known as heterozygous. 

Hence

An orgamism with two unlike genes of a trait is called heterozygous 
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Answer 2

Answer: hybrid

Explanation:

Example:Tt (two unlike genes)

Said to be hybrid tall according to medel's experiment.