Question 2 of 21

The rough draft of the complete human genome was unveiled in:

... The rough draft of the complete human genome was unveiled in 2000, whereupon U.S. President Bill Clinton said that the data should be available to all.

Question 3 of 21

Humans have approximately the following number of genes:

... Humans have approximately 22,000 genes in their DNA.

Question 4 of 21

The Human Genome Project began in:

... The Human Genome Project began in 1989.

Question 5 of 21

Roundworms have the following number of protein-coding genes:

... Roundworms have 20,000 protein-coding genes -- not far behind humans.

Question 6 of 21

Mutations in the BRCA genes are linked to:

... Mutations in the BRCA genes are linked to several types of cancer, most notably breast cancer.

Question 7 of 21

A human being has the following number of chromosomes:

... A human being has 46 chromosomes -- two sets of 23 each.

Question 8 of 21

Mitrochondrial DNA, or mtDNA, is passed down from:

... Mitochondrial DNA is passed down from mothers to both sons and daughters.

Question 9 of 21

Y-DNA is passed down:

... Because only males have Y-chromosomes, Y-DNA is passed down only from fathers to sons.

Question 10 of 21

In order to study the genes they share with humans, scientists often tinker with the genomes of:

... Scientists often tinker with the genomes of mice, which share many genes with humans and are easy to breed.

Question 11 of 21

The final draft of the human genome was presented in:

... The final draft of the human genome was presented in 2009.

Question 12 of 21

Humans have the following percentage of genes in common with great apes:

... Humans and great apes share about 98 percent of the same genes.

Question 13 of 21

The BRCA and p53 genes are known as:

... The BRCA and p53 genes are often referred to as 'tumor suppressors.'

Question 14 of 21

Multifactorial genetic disorders are caused by:

... Multifactorial genetic disorders are caused by multiple defective genes and possibly environmental factors.

Question 15 of 21

Down syndrome is an example of which type of genetic disorder?

... Down syndrome is a genetic disorder that's the product of a chromosome abnormality.

Question 16 of 21

Mitochondria are known as:

... Because they provide energy to cells, mitochondria are known as the powerhouse of the cells.

Question 17 of 21

All humans can trace their lineage back to a single population from which continent:

... Humans can trace their lineage back to a single population from the African continent.

Question 18 of 21

Our human ancestors left the African continent:

... Our human ancestors left the African continent approximately 60,000 years ago.

Question 19 of 21

An allele is:

... An allele is a variation of a gene, which usually can present itself in at least two possible forms.

Question 20 of 21

The study of the genetic profiles of multiple species is known as:

... Comparative genomics is the study and comparison of the genomes of different species.

Question 21 of 21

Studies have shown that a human's lifespan is likely affected by:

... Various studies have shown that, in addition to environmental and experiential factors, multiple genes likely affect lifespan.

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