Chapter 8 Outline 10Th Grade Essay Research
Biology Chapter 8 Outline
Ten Chromosome: one of the chromosomes that determine a sex ; sex chromosomes
Y Chromosome: one of the chromosomes that determine sex,
Sexual activity chromosome
Sexual activity chromosomes: because the two chromosomes differ between the sexes, we call them sex chromosomes.
Autosomes: chromosomes non related to an being & # 8217 ; s sex.
Sex-linked feature: trait whose cistrons are carried on the X chromosome.
Nondisjunction: failure of homologs to segregate during miosis.
Chromosome theory of heredity: the theory that cistrons are located on chromosomes.
Gene linkage: the cistrons that occur on the same chromosome ( linked )
Crossing-over: exchange of sections of chromosomal stuff between two strands of a four ; occurs during prophase of miosis.
Recombination gametes: gametes with a set of linked cistrons different than that found in the parent.
Familial map: the location of cistrons on a chromosome.
Continuous fluctuation: the presence of many multiple length progeny.
Multiple cistrons: three or more different allelomorphs commanding a trait.
Modifier cistrons: cistrons that affect the look of other allelomorphs.
Familial guidance: type of guidance in which parents can be advised of their opportunities of holding offspring with a familial disease.
Deadly cistron: an allelomorph that causes decease.
Ultrasonography: a technique used to find the place and anatomy of a foetus.
Fetoscopy: allows direct observation of the foetus and environing tissues.
Endoscope: device that allows a foetus to be viewed while it is still in the womb.