Question

NAME (S) Problem Set 4 Due Monday February 12 at 5pm A. In the Mexican swordtail fish, the wild-type color is olive-green. Other color variants include golden and albino. Take caution with ratios; there is some reduced viability in this system. latings involving fish of these three phenotypes are shown below: rosses en atio/Cross golden X golden all golden albino A albino golden X albino all wild-type wild-type X golden 68 wild-type 32golden w wild-type X wild-type 202 wild-type: 65 golden: 72 albino wild-type from golden X albino cross Explain the inheritance of these color phenotypes in the fish.

Answer 1

A. In the Mexican swordtail fish, the wild-type color is olive-green. Other color variants include golden and albino. Take caution with ratios; there is some reduced viability in this system. latings involving fish of these three phenotypes are shown below Note that wild type is always dominant over other color variants Let the symbol for golden be ''and symbol for albino be 'a rosses en atio/Cross golden A goldern all goldern ino THE INHERITANCE PATTERN IS INCOMPLETELY DOMINANT In the wild-type both '' and'a' alleles were there X aa/ all genotvpes will be ga a Xge/ 1:1 ratio of wildtype:golden ga Xaa/1:1 ratio of wildtvpe: albino golden A albino 8 wild-type: 52 golden wild-typeX golden wild-typeX albino wild-type* X wild-type wild-type: 23 albino 2 wild-type: 65 golden: 72 albinoga Xga 1:2:1 ratio of olden:wild type:albino wild-type from golden ino croSS Explain the inheritance of these color phenotypes in the fish

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