Vocab
Definition of Nucleus
Organelle in cells that contain the genes.
How do humans see colour.
Light hits the cone cells and then a signal is sent to the brain and the brain interprets it as colour.
Why do some people see colour differently
Because theire opsins are shaped differently
Whats the function of genes?
Responsible for the expression of traits.
Definition of chromosome
Threadlike structures made of DNA molecules
Definition of DNA
The chemical building blocks that make up genes.
What are the two type of receptor cells in our eyes.
Rods and Cones
Protein is a special type of__________
molecule
Examples of genes
Eye sight, Taste, Blood type, Height, Hair color
How many chromosomes does most people have
46 or 23 pairs
Definition of Allele
Different versions of the same gene.
How do our senses work.
Specialized cells that sends signals to the brain.
Why are pigment molecules not produced in people that cant tan
Becasue their receptor is the wrong shape
Where can you find genes?
In the DNA in the chromosome in the nucleus.
Where are chromosomes found
In the nucleus of the cell
Definition of Optic Nerve
A nerve that carries signals from the rods and cones.
Whats the bumps on the tounge called
Papillae
Whats the relationship between stimulus and receptor protein?
Stimulus are sensed by receptor protein.
Definition of gene
A gene is a portion of DNA that determines the certain trait.
What chromosome is found in only males
The Y chromosome
Defintion of Stimulus
A detectable change in the enviroment for example sound or light.
Whats the nerve in the eye called?
Optic nerve
How are protein receptors made?
Using amino acids.
How many genes does a person have.
20,000-25,000
What is a karyotype
A collage of photos of real chromosomes