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Cancer cells within which of the following biopsy samples would be the best indicator that the cancer has metastasized and is circulating through the bloodstream?

Cancer cells within which of the following biopsy samples would be the best indicator that the cancer has metastasized and is circulating through the bloodstream?

		liver
		lymph node
		pancreas
		ovary

Which of these conditions is caused by nondisjunction of autosomal chromosomes?

		XO-Turner syndrome
		Trisomy 21-Down syndrome
		XXY-Kleinfelter syndrome
		Trisomy X-Meta female

DNA is double stranded and similar in structure to a twisted rope latter composed of nitrogenous bases paired with hydrogen bonds in what order?

		Adenine and cytosine, thymine and guanine
		Adenine and thymine, guanine and cytosine
		DNA replication and DNA polymerase
		Sister chromatids and centromere

DNA is often likened to an instruction manual. According to this analogy, the typographical errors that would inevitably result when the DNA “manual” is transcribed would be similar to:

		dominant alleles.
		recessive alleles.
		mutant alleles.
		homologous chromosomes

What can be concluded about the ability of doctorate-category sperm to help produce children that are smarter than average?

		Because intelligence has no genetic basis, there is no real reason to expect children produced by this type of sperm to be smarter than average.
		Children produced by this type of sperm have an approximately 72% chance of being more intelligent than average.
		There is currently no way to predict whether children produced by this type of sperm will be smarter than average.
		Children produced by this type of sperm will be smarter than average only if the mother has a high IQ.

Match the following term to its definition.

-A.B.C.D.E.F.G.H.I.J.	Alleles
-A.B.C.D.E.F.G.H.I.J.	Phenotype
-A.B.C.D.E.F.G.H.I.J.	Gametes
-A.B.C.D.E.F.G.H.I.J.	Gonads
-A.B.C.D.E.F.G.H.I.J.	Genes
-A.B.C.D.E.F.G.H.I.J.	Crossing over
-A.B.C.D.E.F.G.H.I.J.	Meiosis
-A.B.C.D.E.F.G.H.I.J.	Mitosis
-A.B.C.D.E.F.G.H.I.J.	Segregation
-A.B.C.D.E.F.G.H.I.J.	Quantitative traits

A.	The separation of a pair of alleles
B.	Results in two identical daughter cells
C.	Traits with a wide range of phenotypes like eye color, height, and intelligence
D.	Small segments of DNA that code for proteins
E.	Occurs during prophase I of Meiosis I
F.	Alternate forms of genes
G.	Sex organs
H.	Physical traits
I.	Results in a reduced number of chromosomes
J.	Sex cells

Assume the gene for freckles is dominant (F). A woman with freckles has a son that does not. What would have to be the genotype of the mother?

Assume that Tay-Sachs disease only affects homozygous recessive individuals. If two parents are carriers, what are the chances that their child would have the disease?