Science Flashcards
One set of instructions for an inherited trait.
Gene
One of the alternative forms of a gene tat governs a characteristic, such as hair color.
Allele
An organism’s appearance or their detectable characteristic.
Phenotype
The entire genetic makeup of an organism also the combination of genes for one or more specific traits.
Genotype
The likelihood that a possible future event will occur in any given instance of the event.
Probability
A process in cell division during which the number decreases to half the original number bu two divisions of the nucleus, which results in the production of sex cells.
Meosis
One of the pair of chromosomes that determine the sex of an individual.
Sex Chromosomes
A diagram that shows the occurrence of a genetic trait in several generations of a family.
Pedigree
The trait observed in the first generation when parents that have different traits are bred.
Dominant trait
A trait that reappeared in the second generation after disappearing in the first generation when parents with different traits are bred.
Recessive Trait
The passing of genetic traits from parent to offspring.
Heredity
Hereditary material in humans and almost all organism.
DNA
a compound consisting of a nucleoside linked to a phosphate group. Nucleotides form the basic structural unit of nucleic acids such as DNA.
Necleotide
he changing of the structure of a gene, resulting in a variant form that may be transmitted to subsequent generations, caused by the alteration of single base units in DNA, or the deletion, insertion, or rearrangement of larger sections of genes or chromosomes.
Mutations
Ribonucleic acid (abbreviated RNA) is a nucleic acid present in all living cells that has structural similarities to DNA. Unlike DNA, however, RNA is most often single-stranded. An RNA molecule has a backbone made of alternating phosphate groups and the sugar ribose, rather than the deoxyribose found in DNA.
RNA
