Can you help me with genetics questions?

Directions: In each set, tell which word does not fit with the others. Then explain why you think it does not. You must mention all words.

1. Aa, Heterozygous, Hybrid, Homozygous
Ans: Homozygous doesn't belong because letters are mixed. Aa is an example of heterozygous which is same as a hybrid.

2. AA, Homozygous, Purebred, Heterozygous
Ans: Heterozygous doesn't belong because mixed letters used to define it. AA is an example of homozygous which is same as purebred.

3. Aa, Genotype, Phenotype, Heterozygous
Ans: Phenotype doesn't belong as it is the physical appearance. Aa is an example of genotype and heterozygous.

4. AA, dominant, recessive, homozygous
Ans: Recessive doesn't belong and lower case letters are used to describe it. AA is an example of a dominant homozygous.

5. Trait, phenotype, genotype, brown hair.
Ans: Genotype doesn't belong. It represent allele combinations. Trait, phenotype, and brown hair all refer to physical characteristic/appearance.

6. aa, dominant, recessive, homozygous.
Ans: Dominant doesn't belong and capital letters are used to describe it. The aa represents a recessive homozygous gene.

7. Allele, A, trait, genotype.
Ans: Trait doesn't belong. It's the physical appearance. The A is a single allele which also represents a genotype.

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