Illustrate how the five basic human eye colors can be explained by a model using two genes (A and B), each of which
has two alleles (A and a, B and b).What will be an ideal response?
In this model, human eye color is determined by different combinations of alleles of two
genes interacting to synthesize and deposit melanin in the iris. If two genes control a trait and
each has a dominant and a recessive allele, there are five phenotypic classes in the F2, each
of which is controlled by four, three, two, one, or zero dominant alleles. The F2 ratio of 1 : 4
: 6 : 4 : 1 results from the genotypic combinations that produce each phenotype. At one
extreme is the homozygous dominant (AABB) genotype with four dominant alleles; at the
other extreme is the homozygous recessive (aabb) genotype with no dominant alleles. The
largest phenotypic class (6/16) has six genotypic combinations. Combinations of alleles result
in small differences in eye color.
You might also like to view...
Select the formula below that correctly represents the behavior of CO2 in the blood.
A. CO2 + H2O ? H2CO3 + CO B. CO2 + H+ ? HCO3+ ? H2O + H2CO3 C. CO2 + HCO3- ? H+ + H2O + H2CO3 D. CO2 + H2O ? H2CO3 ? HCO3- + H+ E. CO2 + H2CO3 + O2 ? H2O + CO2 + H2CO3
Which process seems to be the most similar between eukaryotic and prokaryotic genetic regulations?
A) 5'-capping regulation B) RNA splicing regulation C) intron/exon shuffling D) transcriptional regulation E) poly(A) tail addition
In which type of incident is the rehab center located farthest from the operational area?
a. confined space b. wildland c. high-rise d. hazardous materials
There currently is no effective cure for AIDS.
Answer the following statement true (T) or false (F)