Chapter 9 Genetics Flashcards
Genotype
A persons unique genetic makeup
Phenotype
An individuals observable traits
Zygote
Single cell formed at conception from the union of egg cell & sperm cell
Chromosome
Long, thread-like structure composed of twisted parallel strands of DNA
Found in cell nucleus
DNA (deoxyribonucleic)
Double stranded molecule that encodes genetic instructions
Chemical bias of heredity
Gene
Unit of DNA on chromosome
Epigenetics
Study of cellar mechanisms that control gene expression & of ways that gene expression affects health & behavior
What is the 4th trimester
3 months after the baby is born & is whether it was healthy baby or an unhealthy baby
Main time for mother to reach homeostasis
Teratogens
Harmful agents or substances that can harm the embryo or the baby
Neural Tube
3 weeks - tube thickens & bulges
Fetal Period
Used neural connections & strengthened
During 6th period
Fetus’s brain activity becomes similar to newborn baby
At Birth
Newborns brain is one fourth the size of an adult brain weighing less than one pound
Primitive Reflexes
Rooting - turning head & opening mouth
Sucking - sucking rhythmically
Babinski - fanning & curling toes
Grasping - baby grips
Stepping - moves legs
Gallants
If you stroke the spine towards the right, baby will lateral flex