3.11.3: Mendel’s theory, explanations and corrections
- Page ID
- 49972
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- In crossings, he often used two different variants of one character: two genotype variants (alleles, paralogs) of one gene which control two variants of one phenotype
- “Factors” (genes) are paired in plant but separated in gametes: because of meiosis
- One “factor” is dominant: one variant is working DNA, the other is not
- Different characters are separating between gametes independently: this is how anaphase I of meiosis goes
- This is because different characters are located in different places: i.e., in different pairs of chromosomes
- If genes are located in the same chromosome, they are linked and will not be inherited independently
- However, linkage could be broken in crossing-over (it runs in prophase I of meiosis)
- Sometimes, sex is determined with chromosome set: one gender has the pair where chromosomes are non-equal