8.2 dna & chromosomes Flashcards
which DNA type have chromosomes?
eukaryotic DNA
which type of DNA associates with histones?
eukaryotic DNA
what is the arrangement of prokaryotic DNA?
circular, in a loop
what is the arrangement of eukaryotic DNA?
linear, chromosomes
is there introns/junk DNA in prokaryotic DNA?
no, all coding DNA
is there introns/junk DNA in eukaryotic DNA?
yes, ~90% non-coding
which type of DNA is shorter in length?
prokaryotic
how are chromosomes formed?
DNA associating with histones
where are also DNA found? what does this prove?
in mitrochondria & chloroplasts
-> similar to prokaryotic DNA; proves that they are independent cells that are engulfed
why are chromosome numbers even in adult cells or organisms using sexual reproduction?
require meiosis
in humans, how many maternal & paternal chromosomes are there?
23 & 23
what are homologous pairs?
pairs of like chromosomes: have the same genes at the same loci
what are alleles?
different form of the same gene
