Alleles Are

question 20

Multiple Choice

Alleles are

• A) dominant traits.
• B) recessive traits.
• C) two versions of the same trait.
• D) alternate versions of the same trait.
• E) exact copies of the same trait.

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Definitions:

Deuterostomia

Deuterostomia is a major division of the animal kingdom that includes groups like the chordates and echinoderms, characterized by the developmental feature in which the anus forms from the first opening in the embryo, with the mouth forming later.

Protostomes

A major group of animals in which the mouth develops from the first opening in the embryo, with examples including mollusks, annelids, and arthropods.

Spiral Cleavage

A type of embryonic development in some molluscs and annelids where cells divide in a spiral pattern.

Anterior End

The front part or head end of an organism, usually where sensory organs are concentrated.