Scientists Studying Speciation Often Look at Both Nuclear DNA and Mitochondrial

question 29

Multiple Choice

Scientists studying speciation often look at both nuclear DNA and mitochondrial DNA. Why is the genetic information obtained from mitochondrial DNA different from information obtained through nuclear DNA in sexually reproducing species?

• A) In most organisms, mitochondrial DNA is inherited from the male, while nuclear DNA is inherited from both parents.
• B) Mitochondrial DNA has a very low rate of mutation and is highly conserved, while nuclear DNA changes rapidly.
• C) In most organisms, mitochondrial DNA is inherited from the female, while nuclear DNA is inherited from both parents.
• D) Mitochondrial DNA only has one set of chromosomes, while nuclear DNA typically has multiple sets of chromosomes.

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Definitions:

Spine and Brain

Central components of the nervous system where the brain is the control center and the spine connects it to the rest of the body through nerve fibers.

Germinal Period

The initial two weeks of prenatal development after conception, characterized by rapid cell division and the beginning of cell differentiation.

Fetal Stage

The fetal stage is the last stage of prenatal development, beginning in the ninth week of pregnancy and continuing until birth, characterized by rapid growth and maturation of organs and body systems.

Embryonic

Pertains to the earliest stage of development, typically before birth, often used in biology to describe the early stages of an organism's development.