DNA , Genes and chromosomes the sequel Flashcards
in eukaryotic DNA, genes that do code for polypeptides contain sections that do NOT code for ________
amino acids
sections of DNA that do not code for amino acids are called______
introns, there can be several introns within a gene
what are all the bits of a gene that do code for amino acids called
exons
when are introns removed
protein synthesis so they don’t affect the amino acid order
does prokaryotic DNA have introns
nah
what does eukaryotic DNA also contain
multiple repeats outside of genes e.g. CCTTCCTTCCTT
a gene can exist in more than one form, what are these forms called
alleles
what are the order of bases in alleles like
the order of bases in each allele is slightly different ,so they code for slightly different versions of the same polypeptide.for example the gene that determines blood type exists as one of three alleles - one determines type O, another type A and the other type B
in eukaryotic cells how is DNA stored
as chromosomes
what is a pair of matching chromosomes known as
homologous pairs
what are the chromosomes comparison like in homologous pairs
both chromsosoems are the same size and have the same genes,although they could have different alleles
where will alleles coding for the same characteristic be found
the same fixed position (locus) on each chromosome in a homologous pair
