FEATURING THE SUMMARY OF SCIENCE 10 UNIT 3 MODULE 2.
INCLUDING RNA AND DNA
GENETIC ENGINEERING
HUMAN KARYOTYPING
DOWNS SYNDROME
CRI DU CHAT
EDWARDS SYNDROME
CHROMOSOME ABNORMALITIES
TRAITS INHERITED
8. One type of RNA, messenger RNA (mRNA) brings
information from the DNA in the nucleus to the
protein manufacturing area, the cytoplasm. In the
cytoplasm , the mRNA becomes the template of
information to make proteins.
Ribosomes, made of ribosomal RNA (rRNA), and
ribosomal proteins hold tightly into the mRNA using
its information to assemble the amino acids in
correct order.
Transfer RNA (tRNA) supplies amino acids to the
ribosome to be assembled as protein.
20. During pregnancy, an error in mitosis can occur, just like
the error previously described in meiosis. If
the chromosomes do not split into equal halves, the new
cells can have an extra chromosome (47 total) or have a
missing chromosome(45 total). This is another way a
baby can be born with a chromosome abnormality.
35. KEY CONCEPTS
A mutation is a change in the base sequence of DNA.
Mutations may affect only one gene, or they may
affect whole chromosomes.
Mutation in body cells affect only the individual and
are not passed on to the offspring.