The study of the way animals and plants on their offspring such as: eye color, hair color, height, body build, blood types, intelligence, gender, etc.

Characteristics that a child recessives from both parents.

Basic unit of all living matter

how many cells in adults?

Substance of a cell outside the nucleus

*Central point of cell *Contains genetic coding for maintaining life systems *Issuing commands for growth and reproduction

How many chromosomes in the nucleus

Bands on Chromosomes

How many chromosomes are in the reproductive (egg & sperm) or Germ cells?

A cell divides by copying DNA * cell splits * New cell with normal number of chromosomes * Cell growth &r epair

It creates 1/2 sets of chromosomes (23 WOMEN) (23 MEN)

____ is the union of an Ovum and the Sperm

More powerful - trait seen in person

Weaker and hides in the background * Trait can only determine when 2 of them are present * May show in future generations

Has a recessive gene that is not VISIBBLE

Mother passes the recessive X to son

The cell that is formed when a sperm fertilized an Egg (ovum)

*Identical Twins 1 egg + 1 sperm *Fertilized ovum splits into 2 identical cells *Always the same gender

*Fraternal Twing 2 eggs + different sperm * Will look the same *May be different or the same gender

*More than 2 *May be identical, fraternal or both * May be different or the same gender

Ovum splits apart, but seperation is not completed

4 FACTORS may contribute to Multiple births:

*When an x-gene from the mother is faulty. *There is a 50/50 chance the child inheriting the disoder.

When a group of signs and symthoms occur together and characterize a particular problem

A condition that is present at birth

Interaction of genes with other genes or with environmental factors.

The fertilized egg cell that contains chromoses in an Abnormal number, Structure or Arrangement