In order for a male to express a recessive sex-linked trait that is located on x chromosomes, he must have:

an additional recessive allele on his y chromosome

two recessive autosomal alleles

an inactive allele

one recessive allele on his x chromosome
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1. variations in a population of moths allow for some of its members to be able to adapt to environmental changes. the better adapted of the moths will be able to survive the change and thus prevail as the “fittest” of the species. (a) describe three mechanisms in which variation can occur within a species population. (b) explain which mechanism or mechanisms would be responsible for the survival of a population of peppered moths better than white moths in an environment affected by industrial soot. justify your answer.

How does photosynthesis show the conservation of mass and energy?

Adoença vitiligo afeta qual doença do corpo?