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biology 0610printed 239 · PDF 239
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printed 239 · PDF 239
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A pure-breeding plant with smooth stems was crossed with a heterozygous plant with hairy
stems.
What will be the ratio of hairy: smooth stems in the resulting plants?
A 1 hairy: 1 smooth
B 1 hairy:3 smooth
C 3hairy:1 smooth
Dall hairy
10.
Which statement about the human sex chromosomes is correct?
0 oO DB
All boys have two Y chromosomes.
Everybody has at least one X chromosome.
Girls have a Y chromosome and an X chromosome.
Nobody has two X chromosomes.
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