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Genetics Study cards
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45
Biology
9th Grade
04/17/2011

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Term
Heredity
Definition
the transmissions of genetics from parents to offspring.
Term
Inherited Traits
Definition
Physically or Genetically characteristics that are given to the offspring by their parents.
Term
Gregor Mendel
Definition
The scientist who discovered the study of inheritance and traits.
Term
Mendels Law of Dominance
Definition
The trait that is inherited most often is the dominant trait.
Term
Homozygous
Definition
having identical pairs of genes for any given pair of characteristics.
Term
Heterozygous
Definition
having dissimilar pairs of genes for any hereditary characteristic.
Term
Dominant
Definition
one which will be expressed most often if one of the parents has the gene for that trait.
Term
Recessive
Definition
one that will be expressed only if both parents carry the trait.
Term
Allele
Definition
Another type of Gene
Term
Genotype
Definition
the genetic makeup of an organism.
Term
Phenotype
Definition
The physical makeup of an organism.
Term
Self- Pollination
Definition
Transfer of pollen from an anther to a stigma of the same flower.
Term
Cross- Pollination
Definition
The transfer of pollen from an anther of the flower of one plant to a stigma of the flower of another plant.
Term
Fertilization
Definition
The meeting of the egg and sperm cell
Term
Segregation
Definition
The separation of the members of a homologous pair of chromosomes into different gametes through the process of meiosis
Term
Meiosis
Definition
Meiosis is a special type of cell division that produces gametes with half as many chromosomes.
Term
Crossing-Over
Definition
The exchanging of chromosome segments.
Term
Tetrad
Definition
A group of four chromosomes created in cell division.
Term
Dihybrid Cross
Definition
hybridization using two traits with two alleles each.
Term
Hybrid Cross
Definition
an organism resulting from the crossbreeding between two different species or types of animals
Term
Sex Cell
Definition
Gamete
Term
Gametes
Definition
a cell that fuses with another cell during fertilization
Term
Zygotes
Definition
The cell formed by the union of two gametes
Term
Punnet Square
Definition
is a diagram that is used to predict an outcome of a particular cross or breeding.
Term
Probability
Definition
belief that an event will occur or has occurred.
Term
Autosomes
Definition
a chromosome that is not a sex chromosome.
Term
Sex Chromosomes
Definition
Female sex chromosome is X, Male sex chromosome is Y. X is mandatory for male and female.
Term
Monoploid
Definition
Having a single set of chromosomes.
Term
Haploid
Definition
contains one complete set of chromosomes.
Term
Diploid
Definition
Has 2 sets of chromosomes.
Term
Polyploidy
Definition
condition of having three, four, or more sets of chromosomes instead of the two present in diploids.
Term
Incomplete Dominance
Definition
form of intermediate inheritance in which one allele for a specific trait is not completely dominant over the other.
Term
DNA Electrophoresis
Definition
analytical technique used to separate DNA fragments by size
Term
Selective Breeding
Definition
process of breeding plants and animals for particular genetic traits
Term
Inbreeding
Definition
reproduction from the mating of two genetically related parents, which can increase the chances of offspring being affected by recessive.
Term
Hybridization
Definition
act of mixing different species or varieties of animals or plants and thus to produce hybrids.
Term
Mutagens
Definition
physical or chemical agent that changes the genetic material
Term
Genetic Engeneering
Definition
the direct human manipulation of an organism's genetic material.
Term
Restriction Enzhyme
Definition
locate specific sequences of DNA on which to bind and subsequently cleave
Term
Plasmid
Definition
DNA molecule that is separate from, and can replicate independently
Term
Gel electrophoresis
Definition
technique used for the separation of deoxyribonucleic acid (DNA), ribonucleic acid (RNA), or protein molecules using an electric field applied to a gel matrix
Term
DNA Fingerprinting
Definition
analysis of DNA from samples of body tissues or fluids in order to identify individuals
Term
genome
Definition
The complete set of genetic material of an organism
Term
Karyotype
Definition
number and visual appearance of the chromosomes in the cell nuclei of an organism or species
Term
Pedigree
Definition
The record of descent of an animal, showing it to be purebred
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