Question

genotype (genes inherited) yellow pods, red and white speckled flowers, long flat pods offspring 1 yyh^w^pf

		genotype (genes inherited)	phenotype (outward traits)
offspring 1	ppywfp	purple pods, yellow and white flower, flat pod
offspring 2
offspring 3
offspring 4

space used(includes formatting): 939 / 30000

part b: evaluating results
question 1
explain why your model demonstrates how crossing over is important to genetic variation in a species.

space used(includes formatting): 0 / 30000

Explanation:

Crossing over occurs during meiosis when homologous chromosomes exchange genetic material. In the model, different offspring have unique genotypes (e.g., Offspring 1 has PpYwFP) and corresponding phenotypes. This variation in genotypes (and thus phenotypes) among offspring shows that crossing over reshuffles alleles, creating new combinations of genes. These new gene combinations increase genetic diversity within the species, as seen in the distinct traits of each offspring. For example, the flower color and pod traits in the offspring differ, indicating that crossing over led to new allele combinations not present in the parents in the same way, thus promoting genetic variation.

Answer:

Crossing over (during meiosis) exchanges genetic material between homologous chromosomes. The model’s offspring have unique genotypes (e.g., Offspring 1: PpYwFP) and phenotypes (e.g., purple pods, yellow - white flowers). This shows crossing over reshuffles alleles, creating new gene combinations. These new combinations increase genetic diversity (variation) in the species, as seen in the distinct traits of each offspring.