The chromosomes of an individual can be photographed and examined by a procedure called: (1 point)
karyotyping Rh factoring ultrasound amniocentesis
karyotyping
What type of mutation occurred in the following example? Original DNA: CAT GAT
New DNA: CAT AT (1 point)
Substitution Insertion Deletion Nondisjunction
Deletion
A mutation in which types of cells would only affect the organism and not future generations? (1 point)
Sperm cell and brain cell Sperm cell and egg cell Egg cell and liver cell Nerve cell and skin cell
Nerve cell and skin cell
Mutations in DNA molecules can occur when (1 point)
a change occurs in DNA nucleotide bases replication of DNA is exact
RNA codons are replaced by DNA nucleotides a DNA enzyme attaches to an RNA codon
a change occurs in DNA nucleotide bases
Crossing over is important because (1 point)
It allows for more genetic diversity of gametes.
It allows for genetic uniformity of gametes.
It allows for even distribution of chromosomes in the gametes. It prevents mutations from entering the gametes.