Question

Suppose synapsis occurred between two homologous chromosomes, and one had alleles for blue eyes and brown hair where the other had alleles for green eyes and blond hair. How many different combinations of these alleles would be possible?

Answer 1

There are four different combinations of alleles for eye and hair color that would be possible.

Step-by-step explanation:

When synapsis occurs between two homologous chromosomes, each carrying different alleles for eye color and hair color, the resulting combinations of alleles in the gametes can be determined using the principles of Mendelian genetics.

In this case, let's call the alleles for eye color A (blue) and a (green), and the alleles for hair color B (brown) and b (blond). Since each gamete receives one allele from each parent, there are four possible combinations of alleles that can occur in the gametes: AB (blue eyes and brown hair), Ab (blue eyes and blond hair), aB (green eyes and brown hair), and ab (green eyes and blond hair).

Therefore, there are four different combinations of these alleles that would be possible.

Answer 2

Four different combinations.

Step-by-step explanation:

Synapsis may be defined as the pairing of the homologous chromosome during the meiosis cell division. This synapsis can result in the chnage in the phenotype and genotype of the organisms.

The crossing over between the alleles for blue eyes and brown hair and alleles for green eyes and blond hair. The outer chromatids are unaffected and same as parent whereas the two inner chromatids are affected. Four different possible combinations are blue eyes/brown hair , blue eyes/blonde hair, green eyes/blonde hair and green eyes/brown hair .

Thus, the answer is four different combinations.