Study your flashcards anywhere!

Download the official Cram app for free >

  • Shuffle
    Toggle On
    Toggle Off
  • Alphabetize
    Toggle On
    Toggle Off
  • Front First
    Toggle On
    Toggle Off
  • Both Sides
    Toggle On
    Toggle Off
  • Read
    Toggle On
    Toggle Off
Reading...
Front

How to study your flashcards.

Right/Left arrow keys: Navigate between flashcards.right arrow keyleft arrow key

Up/Down arrow keys: Flip the card between the front and back.down keyup key

H key: Show hint (3rd side).h key

A key: Read text to speech.a key

image

Play button

image

Play button

image

Progress

1/22

Click to flip

22 Cards in this Set

  • Front
  • Back
gene
unit of DNA which codes for a protein
codon
3 nucleotides on mRNA (anticodon on tRNA and codin on DNA)
muton
recon: one nucleotide
exon: coding
intron: noncoding
heterochromatin
tightly coiled; condensed; cannot be read
euchromatin
looselt coiled; extended; transcriptionally active
hyperchromatin
very condensed
pyknotic
absolutely condensed; cell is dying
cistron
a functional unit
metacentric
centromere exactly in the center
submetacentric
centromere slightly off center
acrocentric
centromere off to one extreme
karyotype
what chromosomes you have
haploid
1 chromosome or single-stranded (1n)
diploid
2 chromosomes (2n)
chromosome aberration
too many or too few chromosomes, but they are normal; 7.5% of all conceptions; 0.6% of live births; make up 60% of early spontaneous abortions; causes include increased maternal age, viruses, and others
numerical abberations
somatic cells contain an abnormal number of normal chromosomes
euploidy
the normal compliment
aneuploidy/heteroploidy
not an exact multiple of the normal karyotype; usually nondisjunction at anaphase
nondisjunction
abnormal distribution during division; can happen during meiosis or mitosis
monosomy
missing a "copy"; virtually nonviable; may not mean the entire chromosome; example: Turner's Syndrome: 1 X
trisomy
an extra "copy"; rarely survive with most trisomy situations; trisomy 21: Down's Syndrome
polyploidy
an exact multiple of the haploid number which exceeds the diploid number