A flowering plant has sex determining mechanism such that XY=male, XX= female. Winge has described a recessive allele on the X-chromosome that lethal when homozygous in female plants, but produces a yellow green uneven color when present in the single X-chromosome ot he the male plant. Normal males and females and heterozgous females are dark green.
Phenotypic ration from crossing heterozygous females with yellow-green males based on the info. below?
Let's say:
XX = Normal, dark green female
XY = Normal, dark green male
X'X = Carrier, dark green female
X'Y= Normal, yellow-green male
X'X' = Lethal, female
X'X x X'Y
___X'___X
X'_X'X'__X'X
Y_X'Y___XY
25% Lethal, female
25% Carrier, dark green female
25% Normal, yellow-green male
25% Normal, dark green male
Monday, February 13, 2012
Phenotypic ration from crossing heterozygous females with yellow-green males based on the info. below?
Labels:
flowers,
yellow flowers
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