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AP Biology
Chromosomes and Human Inheritance
14
Biology
12th Grade
05/01/2011

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Term
sex chromosomes
Definition
one of two kinds of homologous chromosomesthat, in certain combinations, dicate the gender of the new individual. Also has genes unrelated to sexual traits.
Term
autosomes
Definition
Of a sexually reproducing species, any chromosomes of a typethat is the same in both males and females.
Term
karyotype
Definition
Preparation of an individual's metaphase chromosomes arranged by length, centromere location, and shape.
Term
reciprocal crosses
Definition
A paired cross that may identify the role of parental sex on the inheritance of a trait. In the second cross, a trait characteristic of each sex is reversed compared to the original cross.
Term
duplication
Definition
Base sequence in DNA that has been repeated two or more times.
Term
deletion
Definition
Loss of a chromosome segment; often leads to genetic disorders. Also the loss od one or more nucleotides bases from a DNA molecule.
Term
inversion
Definition
A chromosomal alternation; part of the DNA sequence gets oriented in the reverse direction, with no molecule loss.
Term
translocation
Definition
attachment of a piece of a broken chromosome to another chromosome. Also, a mechanism by which organic compounds are conducted in phloem.
Term
aneuploidy
Definition
a type of chromosome abnormality in which body (somatic) cells have one extra or one less chromosome relative to the parental chromosome number.
Term
nondisjunction
Definition
Failure of sister chromatids or homologous chromosomes to move apart in meiosis or mitosis. Daughter cells get too many or too few chromosomes.
Term
polyploidy
Definition
A case of somatic cells having three or more of each type of chromosome characteristic of the species.
Term
pedigrees
Definition
Chart of connections among individuals related by descent.
Term
syndrome
Definition
The set of symptoms that characterize a medical condition.
Term
spectral karyotypes
Definition
A dignostic tool that uses a range of colored fluorescent dyes that bind to specific parts of chromosomes.
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