Genes come in different varieties, called alleles. Somatic cells contain two alleles for every gene, with one allele provided by each parent of an organism. Often, it is impossible to determine ...

In this scenario, the deleterious allele will remain at an intermediate ... eds. Conservation Biology: Evolution in Action. New York, NY: Oxford University Press, 2008. Darwin, C.

Sufferers are almost exclusively males because they only have one X chromosome and need just one recessive allele to show the condition. Only in very rare cases a female will have two recessive ...

1 Homozygous for allele r rr Wrinkled 2 Homozygous for allele R RR Round Plants 2 and 3 both have the same phenotype even though they have different genotypes. This is because the effect of allele ...