A person with Klinefelter syndrome has 44 chromosomes and three sex chromosomes (XXY). The resulting aneuploidy is caused by
a. nondisjunction.
b. crossing over.
c. a mutation.
d. an enzyme deficiency.
e. failure of DNA to replicate.
Ans: a. nondisjunction.
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When a cell has two complete sets of chromosomes, it is:
a. haploid b. duplicated c. diploid d. triploid e. complete
The pulmonary artery carries blood away from the ____
a. aorta b. right atrium c. right ventricle d. left atrium e. left ventricle
Genes that are duplicated within a genome and later diverge in function, such as the RNASE1 and RNASE1B genes in douc langur monkeys, are described as ________
A) duplicated genes B) orthologous genes C) homologous genes D) paralogous genes E) derived genes
Of the two lungs, the one on the left is usually smaller than the one on the right. This provides space for the ________
Fill in the blank(s) with correct word