BIOL 133 Ch. 5 Questions with answer
The different forms of Leber congenital amaurosis arise because there are many
ways that a mutation can disrupt the functioning of the rods and cones, the cells that
provide vision. This best describes what phenomenon?
✔Genetic heterogeneity
The Bombay phenotype is a result of ____ interacting genes and is an example of
____.
✔2; epistasis
Different alleles that are both expressed in a heterozygote are _______.
✔codominant
Mendel's laws can appear to not operate when one gene masks or otherwise affects
the phenotype of another. This phenomenon is called _________.
✔epistasis
The mutation that causes achondroplastic dwarfism is in the gene that encodes a
receptor for a(n)
✔growth factor
In ______ dominance, the heterozygous phenotype is intermediate between that of
either homozygote
✔incomplete
When all mitochondria bear the mutant allele, it is called ________
✔homoplasmy
A compound heterozygote is an individual
✔with two different mutant alleles for the same gene
A(n) _________ is a molecule that the immune system recognizes and responds to
✔antigen
24 of the 37 genes of the mitochondrion encode ______ molecules that help
assemble proteins. The other 13 genes encode proteins that function in cellular
_______, which is the process that uses energy from digested nutrients to
synthesize ATP.
