Genetic causes of variation include alleles, mutations, meiosis (independent assortment and recombination), and sexual reproduction, which combines parental genes.
تتضمن الأسباب الوراثية للتباين الأليلات والطفرات والانقسام الميوزي (التوزيع المستقل والتوزيع العشوائي) والتكاثر الجنسي الذي يجمع بين جينات الأبوين.
| Front | genetic causes of variation 4.2.2(f) |
|---|---|
| Back | genetic causes include - alleles (genes have diff alleles with diff effect depending on parental combination of alleles) - mutation (change in DNA sequence so diff proteins, affecting physical/metabolic characteristics, occurs in body cells (individual affected) or gametes (can pass to offspring) both causing variation - meiosis (independent assortment and recombitant DNA) - Sexual repro (offspring inheits alleles of both parents, so differs from parents, more variation than asexual which produces clones genetically identical to parents) |
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