Question 1
Thalassemias are primarily caused by:
◦ base substitutions that alter α or β globin genes.
◦ deletions that eliminate α or β globin genes.
◦ base substitutions that alter γ or δ globin genes.
◦ deletions that eliminate γ or δ globin genes.
◦ insertions that alter α or β globin genes.
Question 2
The crossover fixation model predicts that:
◦ any sequence of DNA that is not under selective pressure will be taken over by a series of identical tandem repeats.
◦ any sequence of DNA that is under selective pressure will be taken over by a series of identical tandem repeats.
◦ any sequence of DNA that is not under selective pressure will be taken over by a series of nonidentical tandem repeats.
◦ any sequence of DNA that is under selective pressure will be taken over by a series of nonidentical tandem repeats.
◦ any sequence of DNA that is not under selective pressure will gradually reduce its frequency of crossing over.
Growth of yeast cells in culture fits the logistic growth model.
ear model
Eye Model
Heart Model
Three-dimensional model of DNA.
Model of Imperial Rome IN C. 324 CE