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Study Guide for Chapter 3: Genetics

What do we call the different forms of a gene? Alleles
The likelihood that a particular event will occur is called... Probability
What two names do we give to an organism with two identical alleles for a trait? Homozygous or Purebred
Genes are carried from parent to offspring on what structures? Chromosomes
What do genes control? Traits
What is a Punnett square used for? To find out the outcome of your offspring's physical and genetic makeup.
What do we call the scientific study of heredity? Genetics
What do we call the gene makeup of an organism? Genotype
An organism that has two different alleles for a specific trait is known as either a... heterozygous or hybrid.
Who was known as "The Father of Genetics?" Gregor Mandel
In alleles that are codominant,what happens? Both alleles are shown.
An organism's app appearance is considered it's... phenotype.
If you cross two heterozygous parents for a specific trait, what percentage of offspring will express the dominant trait and recessive trait? Dominant: 75% Recessive trait: 25%
A section of DNA has following base sequence: TATGCGCCTAA. What would the corresponding DNA base sequence be? ATACGCGGATT
If you cross two homozygous parents for a specific trait, one dominant and one recessive, what percentage of the children would express the domminant trait? 100%
In what part of a cell can you find the chromosomes? Nucleus
Name the four nitrogen bases of a DNA molecule? Guanine,Thymine, Adenine,& Cytosine.
What two scientists are credited with discovering the structure of DNA? James Watson and Francis Crick
What is the shape of a DNA molecule? A double helix.
Created by: fatma3112