Ch. 3 Science
Terms
undefined, object
copy deck
- the likelihood that a particular event will happen
- probablity
- Characteristic that an organism can pass on to it's offspring through it's genes
- trait
- the process that occurs in sex cells(sperm and egg) by which the number of chromosomes is reduced by half
- meiosis
- the scientific study of heredity
- genetics
- an organism that has 2 different alleles for a trait; an organism that is heterozygous for a particular trait
- hybrid
- the passing of traits from parents to offspring
- heredity
- an allele that is masked when a dominant allele is present
- recessive allele
- RNA that copies the coded message from DNA in the nucleus and carries the message to the cytoplasm
- messenger RNA
- an allele whose trait always shows up in an organism when an allele is present
- dominant allele
- RNA in the cytoplasm that carries an amino acid to the ribosome and adds it to the growing protein chain
- tranfer RNA
- a organisms physical appearance or visible traits
- phnotype
- an organism that always produces ofspring with the same form of trait as the parent
- purebred
- a chart that shows all the possible combination of alleles that can result from a genetic cross
- punnett square
- an organisms genetic makeup, or allele combinations
- genoype
- a segment of DNA on a chromosome that codes for a specific trait
- gene
- a condition in which neither 2 alleles of a gene is dominant or recessive
- codominance
- having 2 identical alleles for a trait
- homozygous
- having 2 different alleles for a trait
- heterozygous
- the different form of genes
- allele