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Ch.12 Sec. 2 and 3
The Cell and Inheretance; Probability and Heredity
10
Science
7th Grade
11/06/2012

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Cards

Term
probability
Definition
a number that describes how likely it is that an event will happen...think of tossing a quarter
Term
Punnett Square
Definition
a CHART that shows all the possible combinations of alleles that can result from a genetic cross
Term
phenotype
Definition
an organism's PHYSICAL appearance, or visible trait
Term
genotype
Definition
an organism's GENETIC MAKE-UP, or allele combinations
Term
homozygous
Definition
having two IDENTICAL alleles for a trait
Term
heterozygous
Definition
having two DIFFERENT alleles for a trait
Term
codominance
Definition
a condition in which neither of two alleles of a gene is dominant or recessive
Term
meiosis
Definition
the process that occurs in the formation of sex cells (sperm and egg) by which the number of chromosomes is reduced by HALF
Term
gene
Definition
the set of information that controls a trait; a segment of DNA on a chromosome that codes for a specific trait
Term
chromosomes
Definition
A DOUBLE-ROD of condensed chromatin; contains DNA that carries genetic information
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