science again Flashcards
Heredity
the passing of genetic traits from parents to offspring
dominant trait
the trait observed in the first generation when parents that have different traits are bred
recessive trait
a trait that reappears in the second generation after generation when parents with different traits are bred
Gene
one set of instructions for an inherited trait
alleles
one of the alternative forms of a gene that governs characteristics such as hair color
Phenotype
an organism’s appearance of other delectable characteristics
genotype
the genetic makeup of an organism
probability
branch of mathematics concerning numerical descriptions of how likely an event is to occur
meiosis
the formation of sperm and egg cells
sex chromosomes
A sex chromosome is a type of chromosome that participates in sex determination
pedigree
A pedigree is a table or chart recording a line of ancestors
DNA
short for deoxyribonucleic acid
nucleotide
one of the structural components or building blocks of DNA and RNA
mutations
A mutation is a change in a DNA sequence
RNA
Ribonucleic acid is a molecule similar to DNA
