Alleles Are

question 420

Multiple Choice

Alleles are:

• A) different forms of a particular gene.
• B) different types of deoxyribonucleic acid (DNA).
• C) defective chromosomes that are missing a few key genes.
• D) chemicals or other environmental agents that are known to cause birth defects.

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Definitions:

Urethra

The tube that carries urine from the bladder to the outside of the body, and in males, also serves as a conduit for semen.

Vagina

The muscular tube leading from the external genitals to the cervix of the uterus in females, part of the reproductive system.

Stratified Squamous Epithelium

A type of tissue composed of multiple layers of flat cells found in areas of the body subject to friction and wear, such as the skin, mouth, and esophagus.

Transitional Epithelium

A form of epithelial tissue capable of expanding and shrinking, situated along the linings of organs like the bladder.