Hemophilia is an X-linked recessive disorder that is passed through generations and can be traced by using a pedigree. A genetic pedigree is shown. The parents of Irena have alleles of Upper X Superscript Upper H baseline Upper Y and Upper X superscript Upper H baseline Upper X Superscript h. In the pedigree that is shown, which represents Irene's allele combination? XhXh XHXh XHXH XhY

in the year 2850, humans successfully colonized mars. the martian modules that were constructed could hold only a small population of people. it is now a century later, and the population on mars has grown to 600 people. of the current mars population, 45 people express the recessive phenotype for phenylketon- uria (pku) syndrome (pp genotype).

explanation:

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