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

Question

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] · Answer 1 · 2023-11-23T02:17:16+03:00

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:

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:

ppA_: 3/16

<h3>b) Albinism only</h3>

P_aa: 3/16

<h3>c) both traits</h3>

ppaa: 1/16

miss Akunina [59] · Answer 2 · 2023-11-23T01:02:48+03:00

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>