Shared Flashcard Set

Details

Genetics and Heredity!
Mendals Experiment, Punnet Squares, Terms to Know, probablity, and allele combinations!
23
Science
7th Grade
11/16/2010

Additional Science Flashcards

 


 

Cards

Term
Heredity
Definition
The passing of phisical charateristics from parent to offspring.
Term
Traits
Definition
The physical characteristics of an organism that can pass on to its offspring through its genes.
Term
Genetics
Definition
The scientific study of Heredity
Term
Fertilization
Definition
The Process where the joining of a sperm (male sex cell) and an egg (female sex cell) happens.
Term
Purebred
Definition
The offspring of many generations that have the same traits.
Term
Gene
Definition
The factors that control a trait.
Term
Allele
Definition
The different forms of a gene.
Term
Recessive Allele
Definition
One whose hidden whenever the dominant is present. This Only shows up in the organism when the allele is present.
Term
Dominant Allele
Definition
One whose trait ALWAYS shows up in the organism when the allele is present.
Term
Hybrid
Definition
An organism that has two different alleles for a trait. (Bb)
Term
Phenotype
Definition
The physical appearence or visible trait.
Term
Genotype
Definition
The Genetic makeup or allele combination.
Term
Homozygous
Definition
An organism that has two IDENTICAL alleles for a trait. (BB or bb)
Term
Heterozygous
Definition
An organism that has two DIFFERENT alleles for a trait(Bb)
Term
He crossed purebred tall-stemmed pea plants with purebred short-stemmed pea plants. The first generation, or the F1 generation all had TALL stems. Later, he let the F1 plants to self pollinate, and the new second generation or the F2 generation were about 75 percent TALL and 25 percent SHORT!
Definition
What did Mendal do in his experiment on genetics and Heredity??
Term
Capital Letters only. (BB)
Definition
What type letter do you use for dominant allele combination??
Term
Lower case letters only.
Definition
What type letters do you use for the recessive allele combinations??
Term
A capital letter then the lower case letter.
Definition
What type letters for the alleles do you use for hybrid or Heterozygous organisms??
Term
Two letters in each allele combination.
Definition
How mamny letters are to be in each allele combination??
Term
Use the first letter in the dominant allele name. Example: In Mendal's experiment, he tested the pea shape. The Dominant trait was round and the the Recessive was wrinkled. The letter you would use would be "R" for the dominant trait, Round.
Definition
How do you determine what letter you use in Allele combinations??
Term
Punnet Square
Definition
A chart that shows all of the possible allele combinations that can result from a genetic cross.
Term
Probability
Definition
A number that describes how likely it is tha an event will occur.
Term
In punnet spuares the parents go on the left side of the square and the top of it.
Definition
Where do the parents go in a Punnet Square??
Supporting users have an ad free experience!