Lab - Genetic analysis and recombination during meiosis (2)

Official Extract:
Genetics and Evolution (1-A): 'Genetic recombination and its contribution to genetic diversity' (1-A-1)

Scientific Issue:
Meiosis is presented as a lottery during which genetic shuffling determines the distribution of alleles within gametes. A random drawing game is used to model these shufflings and translate the genotype of individuals involved in different crosses.
The objective is to present feasible models in class and indicate the conditions for their realization for the diploid species Drosophila melanogaster.

Procedure:
The 'crossing between genetic combinatorial and mathematical formalization' (excerpt from the Terminale S programs) will be carried out using urns containing colored balls.
The activities aim to address the issues raised earlier (see Lab 'Genetic analysis and shuffling during meiosis (1)').
The explanation of the results tests the validity of hypotheses regarding the number of gene(s) involved in the crosses. Analogical models then illustrate the segregation of chromosomes, gene distribution, and the hereditary laws that the previously observed strains of fruit flies adhere to. The goal is to develop mathematical models based on a random drawing game.