If an organism with the genotype aabb produces gametes, what proportion of the gametes would be bb?

General
1

if an organism with the genotype aabb produces gametes, what proportion of the gametes would be bb?

2

If an organism with the genotype aabb produces gametes, what proportion of the gametes would be bb?

Answer: To determine the proportion of gametes that would be bb from an organism with the genotype aabb, we need to understand the principles of gamete formation through meiosis.

1. Understanding Genotype and Gamete Formation:

  • The genotype aabb indicates that the organism is homozygous recessive for two genes, a and b.
  • During meiosis, each pair of alleles separates, and each gamete receives one allele from each pair.
  • Therefore, the organism will produce gametes that contain one allele for each gene.

2. Analyzing the Genotype aabb:

  • The genotype aabb can only produce gametes with the alleles ab.
  • This is because for gene a, the only allele present is a, and for gene b, the only allele present is b.

3. Determining the Proportion of bb Gametes:

  • Since gametes are haploid (containing only one set of chromosomes), they will only carry one allele for each gene.
  • A gamete from an aabb organism will carry one a allele and one b allele, resulting in the gamete ab.

Conclusion:

  • The gametes produced by an organism with the genotype aabb will all be ab.
  • Therefore, the proportion of gametes that would be bb is 0%.

In summary, an organism with the genotype aabb will produce gametes with the genotype ab, and none of the gametes will be bb.