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Biology


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biology
science of life
theory
idea(s) to explain facts/what we know
organism
living thing
organ system
organs working together to help the organism live
organ
group of same tissues that work together
tissue
group of same cells that work together
cell
basic unit of life
organelle
tiny parts of a cell, each having a special job
cell membrane
around the cell (animals) or under the cell wall (plant cells), controls what goes in and out
cell wall
around plant cells, keeps the shape of the cell and keeps it safe
cytoplasm
the liquid inside the cell
mitochondria
organelle that gives energy
chloroplast
organelle that makes food from the sun
vacuole
organelle that stores food and water
nucleus
organelle that tells what the cell to do; holds the DNA
nucleus membrane
around the nucleus; keeps the nucleus safe
endoplasmic reticulum
organelle that makes things the cell needs to live
golgi apparatus
organelle that packages things and sends them to different places
genetics
The branch of biology that studies the passing on of traits
chromosomes
Pieces of DNA found inside the nucleus
genes
Pieces of DNA made of 2 alleles
allele
A piece of DNA that makes people look or act a certain way
trait
A characteristic that makes an individual unique
heredity
The passing on of traits from parents to offspring
nucleotide
The sugar-phosphate-nitrogen base molecule that makes DNA
Hybrid
A baby made from mixing parent traits
Monohybrid
Only one trait is mixed
Dominant
The stronger allele. It will always be seen. Shown using a capital letter
Recessive
The weaker allele. Only seen where there are no dominant. Shown using lowercase letter
Phenotype
What an organism looks like
Genotype
The gene (letters) for a trait
Homozygous
A gene with two identical alleles
Heterozygous
A gene with two different alleles