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Veronika [31]
2 years ago
15

PKU and albinism are two autosomal recessive disorders,unlinked in human beings. if couple each of them heterozygous for both tr

aits, produce a child, what is the chance of their having a child with (a)PKU (b)albinism (c)both traits?

Biology
2 answers:
sammy [17]2 years ago
6 0

Answer:

a) 3/16; b) 3/16; c) 1/16

Explanation:

PKU and albinism are two autosomal recessive disorders. The possible genotypes and phenotypes for each disease are:

<u>PKU</u>

  • PP: normal
  • Pp: normal
  • pp: PKU

<u>Albinism</u>

  • AA: normal
  • Aa: normal
  • aa: albinism

If a couple of individuals heterozygous for both genes (PpAa) has offspring, from the Punnett Square we get the chances of them having:

<h3>a) PKU only</h3>

ppA_: 3/16

<h3>b) Albinism only</h3>

P_aa: 3/16

<h3>c) both traits</h3>

ppaa: 1/16

miss Akunina [59]2 years ago
5 0
A. multiply the chance that it will be a boy x the chance he will have PKU (1/2 x 1/4) 

<span>B. chance of having PKU + chance of albinism </span>

<span>C. chance PKU x chance albinism</span>
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