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Dugg Dugg
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6 years ago
In birds, sex is determined by a ZW chromosome scheme that is much like the typical XY scheme seen in humans and many other organisms, except that the system is reversed: Males are ZZ (similar to XX in humans) and females are ZW (similar to XY in humans). A lethal recessive allele that causes death of the embryo occurs on the Z chromosome in pigeons. What would be the sex ratio in the offspring of a cross between a male heterozygous for the lethal allele and a normal female?
A) 1:1 male to female
B) 4:3 male to female
C) 3:1 male to female
D) 1:2 male to female
E) 2:1 male to female
Textbook 
Biological Science, Canadian Edition

Biological Science, Canadian Edition


Edition: 2nd
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hayley2007hayley2007
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6 years ago
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Dugg Author
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6 years ago
I appreciate what you did here, answered it right Smiling Face with Open Mouth
rudy.zondo
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Yesterday
This helped my grade so much Perfect
hannahspillett
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2 hours ago
Smart ... Thanks!
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