If Estimates of an Extinction Rate 10,000 Times Greater Than

question 38

Multiple Choice

If estimates of an extinction rate 10,000 times greater than the background rate are correct,then what percentage of all species will be extinct by the end of this century?

• A) 5 - 10%
• B) 10 - 25%
• C) 25 - 33%
• D) 25 - 50%
• E) 60 - 75%

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Definitions:

Y-Chromosome

A sex chromosome, typically present in males, responsible for determining male biological characteristics.

Sex-Linked Abnormalities

Genetic disorders that are associated with the sex chromosomes, often leading to disease or condition manifesting predominantly in one sex.

Dominant-Recessive Pattern

A genetic principle where one allele is dominant over another allele for a particular trait, determining the organism's appearance.

Recessive Trait

A genetic feature that is expressed in an individual only when two copies of the gene responsible for the trait are present.