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Dihybrid Crosses & Gene Linkage

دربارهٔ این شبیه‌سازی

Explore two-locus inheritance with chromosome pairs, gamete probabilities and a weighted Punnett square. Compare independent assortment, linkage and a test cross.

دانش‌آموزان چه چیزهایی را می‌توانند کاوش کنند

  • Set r to 50% and cross AaBb × AaBb. What phenotype ratio appears, and what changes with linkage?
  • Two loci, complete dominance, equal viability and identical recombination in both parents. r ranges from 0 to 0.5. The grid shows probabilities, not equally likely boxes. Advanced model; no epistasis or sex linkage.

اهداف یادگیری

  1. 1Set r to 50% and cross AaBb × AaBb. What phenotype ratio appears, and what changes with linkage?

پرسش‌هایی که معلم‌ها می‌پرسند

Set r to 50% and cross AaBb × AaBb. What phenotype ratio appears, and what changes with linkage?

Independent assortment gives 9:3:3:1. Lower r favours parental gametes, so the phenotype ratio changes. At r = 0, no recombinant gametes are produced.

About the model

Two loci, complete dominance, equal viability and identical recombination in both parents. r ranges from 0 to 0.5. The grid shows probabilities, not equally likely boxes. Advanced model; no epistasis or sex linkage.

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