In tigers, a recessive allele that is pleiotropic causes an absence of fur pigmentation (a white tiger) and a cross-eyed condition. If two phenotypically normal tigers that are heterozygous at this locus are mated, what percentage of their offspring will be cross-eyed? What percentage of cross-eyed tigers will be white?

Question

02-08-2019
Biology

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In tigers, a recessive allele that is pleiotropic causes an absence of fur pigmentation (a white tiger) and a cross-eyed condition. If two phenotypically normal tigers that are heterozygous at this locus are mated, what percentage of their offspring will be cross-eyed? What percentage of cross-eyed tigers will be white?

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podgorica podgorica · Answer 1 · 2019-08-09T06:53:59+02:00

Answer:

percentage of their offspring with cross-eye [tex]= 25[/tex]%

Percentage of cross-eyed tigers with white fur out of the cross eyed tigers[tex]= 25[/tex]%

Explanation:

Let the recessive allele representing the “white fur” trait in tigers be “w”

Allele representing the “pigmented fur” trait in tigers be “W”

Similarly recessive allele representing the “crossed eye” trait in tigers be “c” and “normal eye” trait in tigers be “C”

Two heterozygous normal tigers will have genotype – WwCc

A punnet square representing cross between two tigers with genotype “WwCc” is as follows –

WC Wc wC wc

WC WWCC WWCc WwCC WwCc

Wc WWCc WWcc WwCc Wwcc

wC WwCC WwCc WwCC wwCc

wc WwCc Wwcc wwCc wwcc

Genotype of Tiger with cross eyes are – WWcc, Wwcc, Wwcc, wwcc

Number of tigers with cross eyed 4

percentage of their offspring with cross-eye

[tex]\frac{4}{16} * 100\\= 25[/tex]%

Percentage of cross-eyed tigers with white fur out of the cross eyed tigers

[tex]\frac{1}{4} * 100\\25[/tex]%

angleangel123 angleangel123 · Answer 2 · 2020-07-18T20:20:09+02:00