Chapter 2 Flashcards
What are genes?
Blueprints for creating a person, stored and communicated.
What is meiosis?
The process of sex cells splitting.
What is mitosis?
The replication of all other cells.
What is a genotype?
The set of genetic traits a person inherits.
What are dominant traits?
Traits expressed when a competing trait is present.
What are recessive traits?
Traits only present if both recessive counterparts from each parent are present.
What is behavioral genetics?
The study of hereditary behavior and development.
What are chromosomal abnormalities?
Conditions like Down syndrome, which is caused by an extra chromosome on the 21st pair.
What is a zygote?
A fertilized sex cell egg.
What are the prenatal developmental stages?
- Germinal: Zygote
- Embryotic: embryo
- Fetal: fetus
What are the stages of childbirth?
- Dilation
- Baby born
- Delivery (placenta)
Why are sex linked recessive genetic defects most often expressed in male children?
Recessive genes on the x chromosomes are always expressed in males
