A woman has been married twice. Her 1st husband was blood type B and their child is type O. Her 2nd husband is type B, and their child is type AB. What is the womans genotype?
2007-03-27 10:18:46 · 3 answers · asked by confused 1 in Science & Mathematics ➔ Biology
AO.
Her first husband was BO. Her second husband is BB.
2007-03-27 10:22:18 · answer #1 · answered by Brian L 7 · 0⤊ 1⤋
The first child tells us that the woman has one allele for O since the child must have two Os (child is OO or ii). The second child tells us that the woman has one allele for A because the child is AB and the father is B. So the woman's genotype is AO or IAi, depending on which system your teacher uses.
2007-03-27 17:24:10 · answer #2 · answered by ecolink 7 · 0⤊ 0⤋
A/O
Since O is recessive, she must have an O allele for the first child to be O. Since A is codiminant and not expressed by her second husband, she must have an A allele for the second child to be A/B.
Brian is right about the first husband being B/O, but the second husband might either be B/O or B/B.
2007-03-27 17:22:22 · answer #3 · answered by Professor Beatz 6 · 0⤊ 0⤋