#Question id: 5077
#Unit 5. Developmental Biology
Humans and mice heterozygous for loss-of-function mutations in Pax6 have:
#Question id: 751
#Unit 1. Molecules and their Interaction Relevant to Biology
The effect of alkali is to change the ___________________ of the DNA structure:
#Question id: 3638
#Unit 8. Inheritance Biology
Four different mutant lines showing similar phenotype were identified from a genetic screen. When genetic crosses among these mutants were carried out, the first mutant was found to complement the second, third and fourth mutant lines. However, no other complementation groups do the four mutant lines belongs to?
#Question id: 3417
#Unit 11. Evolution and Behavior
In balancing selection, two or more alleles are kept in balance, and therefore are maintained in a population over the course of many generations. Which of the following example can support balancing natural selection?
A- Sickle cell allele kept in balance because heterozygotes have greater chance of survival if infected by the malarial parasite, compared with normal homozygotes
B. One morph has selective advantage over another morph
C. One homozygote has greater chance of survival than other genotype results in purity of population
D. many species of invertebrates exist as different colored forms, identical in all respects except color. Visually searching predators often develop a search image for one color form, usually the commoner
#Question id: 10335
#Unit 6. System Physiology – Plant
plants can store high levels of nitrate, and they can translocate it from tissue to tissue without deleterious effect. Yet if livestock or humans consume plant material that is high in nitrate, they may suffer with,