A pair of homologous chromosomes involved in normal meiosis in an ovary carries the alleles shown - VCE - SSCE Biology - Question 4 - 2009 - Paper 1

To determine the chromosomes detected in the eggs produced, we need to consider the process of meiosis in which the homologous chromosomes undergo recombination and segregation.

We have the following alleles on the homologous chromosomes:

• One chromosome carries the alleles F, G, and R.
• The other chromosome carries the alleles f, g, and r.

During meiosis, these chromosomes can assort and combine in various ways, resulting in several possible combinations being passed onto the eggs.

Analyzing the options provided:

• A: This combination is not possible since it contains both dominant and recessive alleles incorrectly combined.
• B: This combination contains alleles that could derive from both parents but is not a direct representation of the provided chromosomes.
• C: This combination of alleles (F, R, g) correctly follows the principles of independent assortment, maintaining the gene combinations possible from meiosis.
• D: This combination (g, h) doesn’t correspond to either of the original alleles correctly.

Thus, the correct chromosomes detected in the eggs produced would be option C (F R g).