Inclusions in kit - Dihybrid cross in crossing over

Ref:575472
Plus de 300 drosophiles à observer
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Data sheet Inclusions in kit - Dihybrid cross in crossing over

Description

Presentation:This series presents in an elegant storage box 8 slides to observe:- 1 parents slide,- 1 direct F1 slide,- 6 test slides carrying a total of about 300 individuals fully respecting the natural distribution; the kit is accompanied by illustrated instructions, size: 21 x 29.7 cm Objectives:Observe with the binocular magnifier the sorted population (but not counted!), develop models, study the chromosome segregation, the distribution of genes. From these results, define the type of hereditary law which meets the strain studied.

Specifications

Mutations étudiées : Ailes vestigiales et corps noir.
1 lame Parents : Homozygotes sauvages P1 ailes longues et corps clair, homozygotes mutés P2 ailes vestigiales et corps noir.
1 lame F1 (P1 x P2) : Phénotype ailes longues et corps clair (sauvage).
6 lames test F2 obtenues en back cross : (femelle F1 x mâle P2, souche parentale mutée) : On observe environ 41,5 % phénotype sauvage, 41,5 % phénotype muté, 8,5 % nouveau phénotype associant aile longue et corps noir, 8,5 % nouveau phénotype associant aile vestigiale et corps clair.

Réflexion : Explication de la liaison entre gènes parentaux et de leur taux de recombinaison par back cross dépendant de leur distance sur le chromosome.
Type of inclusion Slide
Type of crosses Intraspecific dihybrid crosses
Type of product Observation

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