Read each of the sentences and associate it with the correct number of genes affecting phenotypes. Place each sentence into the correct box. (HINT: One sentence should be sorted into both boxes.)
Depending on the number of alleles involved, two to three distinct phenotypes are generally
observed.
A graph of the frequencies of phenotypes often shows a normal distribution.
Genes may be on the same chromosome or different chromosomes.
All alleles are of the same gene.
Each gene may have two or more alleles.
Single-Gene traits
Polygenic traits

I’m not really sure

Ibelieve the correct answer is "b.)  increased pressure to increase solubility"hope this , let me know if i was correct.

In order to understand the problems of unwanted infertility in a country — the gambia — where the desire for children and the fertility is very high, a population-based survey was undertaken. all infertile women in 24 randomly selected enumeration areas were assessed. the study included a review of the problems faced and coping mechanisms employed by infertility clients and types of health care available for infertile couples in the different types and levels of the formal and traditional health system. half of the infertile couples failed to seek formal health care, and they have to reach a certain level of care in order to be properly managed. alternative care is often sought. child fostering is also a frequent solution to childlessness. in-depth interviews revealed that traditional care like healers and spiritual leaders are frequently consulted long before formal health care. this delay could be a problem in those cases where infertility is caused by infections.