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Science Bowl Question

📅 NSB MS 2007🎓 MS🔄 Round 12#️⃣ Question 5❓ TOSS-UP📝 Multiple Choice

Which of the following is the BEST example of a heterozygous condition:

W) non-identical twins
X) the matching alleles for a certain physical characteristic are different
Y) one of a pair of chromosomes is lost
Z) two zygotes are fused together
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