In Drosophila melanogaster, vestigial (short) wings (W) are caused by a recessiv
ID: 13960 • Letter: I
Question
In Drosophila melanogaster, vestigial (short) wings (W) are caused by a recessive mutant gene that independently assorts with a gene pair that influences body hair. Recessive Hariy (h) results in a hairy body. A cross (P1) is made between a fly with normal wings and a hairy body and a fly vestigial wings and a normal body. All F1 flies were normal (normal wings and normal bodies) The phenotypically normal F1 files ( normal wings and normal body) were crossed among each other and 1024 F2 file were produced.a) write phenotypes and genotypes of individuala used for P1 cross, and F1 cross and F2 generation
Explanation / Answer
fly with normal wings and a hairy body-------------------WS
vestigial (short) wings (W) are caused by a recessive mutant gene-----------ws
Recessive Hariy (h) results in a hairy body.
WSWS hh X wsws HH
WS h
WS h
ws H
WS h ws H
normal wings and normal bodies
WS h ws H
normal wings and normal bodies
ws H
WS h ws H
normal wings and normal bodies
WS h ws H
normal wings and normal bodies
WS h ws H x WS h ws H
WSH
WSh
wsH
wsh
WSH
WSH WSH
WSH WSh
WSH wsH
WSH wsh
WSh
WSH WSh
WSh WSh
WSh wsH
WSh wsh
wsH
WSH wsH
WSh wsH
wsH wsH
wsH wsh
wsh
WSH wsh
WSh wsh
wsH wsh
wsh wsh
Pheontype-
9/16---------------576----------- normal wings and normal body
3/16------------192------------ normal wings and hairy body
3/16--------------192--------------- short wings and normal body
1/16-----------64 ------------------- short wings and hairy body
WS h
WS h
ws H
WS h ws H
normal wings and normal bodies
WS h ws H
normal wings and normal bodies
ws H
WS h ws H
normal wings and normal bodies
WS h ws H
normal wings and normal bodies