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Genetics
Finals
25
Science
7th Grade
05/20/2010

Additional Science Flashcards

 


 

Cards

Term
Meiosis
Definition
The process that occurs in the formation of sex cells by which the number of chromosomes is reduced by half
Term
Mutation
Definition
A change in a gene or chromosome
Term
Protein synthesis
Definition
The process of making proteins in the cytoplasm
Term
Messenger RNA
Definition
RNA that copies the coded message from DNA in the Nucleus- 1st step of protein synthesis
Term
Transfer RNA
Definition
RNA in the cytoplasm that carries an amino acid to ribosome and adds it to the growing protein chain
Term
Gregor Mendel
Definition
Studied Heredity; Crossed two pea plants with different traits, of offspring have same traits as their parents
Term
Traits
Definition
A characteristics that an organism can pass on to its offspring through it's gene
Term

Nitrogen Bases 

 

Definition
ACGT Adenine, Cytosine, Guanine, and Thymine are the nitrogen bases. Any three combination makes up an amino acid, act, agt, tcg
Term
Genetic Code
Definition
3 DNA molecules that is linked chemically to other amino acid to form proteins
Term
Codominant Traits
Definition
A condition in which neither of two alleles of a gene is dominant or recessive
Term
Phenotype
Definition
An organisms phsyical apperance, or visible traits
Term
Genotype
Definition
An organisms genetic makeup, or allele combinations
Term
Alleles
Definition
The multiple forms of a gene - shown by letters, Rr
Term
Dominant
Definition
An allele that always shows up in the organism when the allele is present
Term
Recessive
Definition
An allele that is masked when a dominant allele is present
Term
Multiple Genes
Definition
The genes act together as a group that produce a single trait
Term
Multiple Alleles
Definition
3 or more forms of a gene that code for a single trait
Term
Hybrid
Definition
An organism that has two different alleles for a trait
Term
Genetic Disorder
Definition

An abnormal condition that a person inherits through genes and chromosomes

 

Term
Hemophilia
Definition
A genetic disorder in which a person's blood clots very slowly or not at all
Term
Down Syndrome
Definition
Extra copy of chromosome 21
Term
Inbreeding
Definition
A selective breeding method in which two genetically similar individuals are crossed
Term
Pedigree
Definition
A chart or family tree that tracks which members if a family have a particular trait
Term
Punnett Square
Definition
Interpretation and use, a table showing allele combinations for parents and possible offsprings
Term
Principles of probability 
Definition
The chance that a certain outcome will be present
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