Bio Test 4
Card Set Information
Bio Test 4
Terms + HW
One of two or more alternative forms of a gene
Allele whose expression is masked if a dominant allele is present. a
Allele that is expressed whenever it is present. A
Possessing two different alleles for a particular gene. Aa
Possessing two identical alleles for a particular gene. AA or aa.
Mating between two individual that are heterozygous for the same gene.
Mating between two individuals that are heterozygous for two genes
Multiple phenotypic effect of one genotype
Caused by more than one gene.
A control sequence at the start of a gene; attracts RNA polymerase and (in eukaryotes) transcription factors.
Sequence in DNA that signals where the gene’s coding region ends.
Portion of an mRNA molecule that is removed before translation
In an operon, a protein that bind to the operator and prevents transcription
A type of mutation in which one DNA base substitutes for another.
Any external agent that causes a mutation
The genetic makeup of a parent. Ex- AA, Rr, tt.
Inheritance pattern of a dominant allele on an autosome
Inheritance pattern of a recessive allete on an autosome
Bacterial gene transfer in which genetic material is transferred by a sex pilus is called
Most of the body’s cells which do not participate in reproductions are called _____ cells
What three steps are involved in every sexual life cycle?
Meiosis, gamete formation, fertilization
What are the 22 pairs of non-reproduction chromosomes called?
Chromosomes that look alike and carry the same sequence of genes are
Two homologous chromosomes exchange genetic information. This is known as
What occurs when chromosomes fail to separate at one of the meiotic divisions?
When part of a chromosome flips and reinserts, this is called?
During what stage of meiosis are the chromosome numbers reduced by half?