Most Scientists Attribute the Mass Extinction of the Dinosaurs to

question 53

Multiple Choice

Most scientists attribute the mass extinction of the dinosaurs to

• A) gradual climate change.
• B) sunspots.
• C) sea- level change.
• D) predation by mammals.
• E) meteorite impact.

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Definitions:

Recessive Traits

Genetic characteristics that are expressed in offspring only when two copies of the gene are present, one from each parent.

Dosage Compensation

A mechanism that ensures equal expression of genes from the sex chromosomes despite the difference in chromosome number between males and females.

X-Linked Gene

A gene located on the X chromosome, with its expression and associated traits often differentially presented in males and females due to X-chromosome inactivation or hemizygosity in males.

Independent Assortment

The principle describing how different genes independently separate from one another when reproductive cells develop.