Which of the following disorders is caused by a defective recessive allele?
A) Down syndrome
B) neurofibromatosis
C) sickle-cell anemia
D) Turner syndrome
Correct Answer:
Verified
Q79: The sperm and ova are both:
A) somatic
Q80: MOST genetic or chromosomal abnormalities present at
Q81: Marge is pregnant and is having a
Q82: Which test samples blood from the mother
Q83: The concept that certain characteristics of a
Q85: Which genetic disorder affects only males?
A) Turner
Q86: Males born with Klinefelter syndrome develop normally
Q87: The risk for giving birth to a
Q88: Children with Down syndrome:
A) nearly always need
Q89: A trait that is NOT easily altered
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