Practice question
Question
An organism possessing two different alleles at a locus is called
Explanation
Heterozygous describes genotype containing two different alleles at a given locus, illustrated by Tt pea plants carrying tall and dwarf alleles. Maternal and paternal origins differ, and during meiosis these alleles segregate into distinct gametes, generating genetic variation. Phenotype depends on allelic interaction: complete dominance, incomplete dominance or codominance. Homozygous genotypes carry identical alleles, monoploid indicates single chromosome set, polyploid multiple sets, concepts related to genome copy number rather than allelic diversity within locus. Cytological correlation with prophase pairing, metaphase alignment and anaphase separation provides visual anchor for memorising genetic laws.
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