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Chapter 8
chromosomes and cell division
10
Biology
9th Grade
11/10/2008

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Term

CHROMATID

Definition
  • one of the two strands of a chromosome 
  • become visible in meiosis or mitosis

 

 

Term
CENTROMERE
Definition
  • holds two sister chromosomes together
  • during mitosis
Term
CHROMATIN
Definition
  • makes up mitotic and interphase chromosomes
  • complex of DNA & proteins
  • loosely coiled so DNA can move easily
Term
SEX CHROMOSOME
Definition
  • one of the pair of chromosomes that determine gender of an individual
Term

AUTOSOME

Definition
  • any chromosome that isn't a sex chromosome
  • there are 44 in a human
Term

HOMOLOGOUS

CHROMOSOME

Definition
  • same sequence of genes
  • same shape, size, and genes for traits
  • pair during meiosis
Term
KARYOTYPE
Definition
  • micrograph of chromosomes visible during cell division
  • show's an individual's chromosomes arranged in homologous pairs
  • in order of diminishing size
Term

DIPLOID

Definition
  • contains 2 haploid sets of chromosomes
Term

HAPLOID

Definition
  • cell, nucleus, or organism that has 1 set of unpaired chromosomes
Term

BINARY FISSION

Definition
  • form of asexual reproduction
  • in single-celled organisms
  • one cell divides into 2 the same size
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