#Question id: 11657
#Unit 10. Ecological Principles
In the following diagram, three models succession are represented. In this diagram A,B,C and D are the species and arrows indicate replaced by
Based on the above, which statement is correct.
#Question id: 4899
#Unit 8. Inheritance Biology
In Neurospora a cross between the genotypes 'A' and 'a' results in an ascus with ascospores of genotypes as shown below:
|
Ascus Class |
Ascospore |
||||||||
|
I |
A |
A |
A |
A |
a |
a |
a |
a |
|
|
II |
A |
A |
a |
a |
a |
a |
A |
A |
|
Statements A to D are events that could have occurred during meiosis.
A) Class I is results of no crossing over between the centromere and gene.
B) Class II is results of single crossing over between the centromere and gene
C) Class I shows segregation of alleles 'A' and 'a' in meiosis II
D) Class II shows segregation of alleles 'A' and 'a' in meiosis II
#Question id: 13129
#Unit 10. Ecological Principles
Biologists performed an experiment with flies to examine the effects of population size on the maintenance of genetic variation and on egg-to-adult survival. From a large source population, they randomly assigned eggs to three experimental populations of size N, equal to 20, 60, and0100. For later generations, they collected N eggs from each population and moved them into identical vials that co0ntained f2re0sh me4d0ium. Th6e0y coun8te0d the number of adult flies that emerged and used tissue samples from the adults for genetic analyses. Genetic variation was measured by scoring alleles at several polymorphic loci and expressed as the average number of alleles at those loci. The results are summarized in Figure 1 and Figure 2 below.
Based on Figure 1, which of the following best describes the change in genetic variation over time?
#Question id: 358
#Unit 1. Molecules and their Interaction Relevant to Biology
Consider the following reaction at equilibrium: CO2 + H2O ⇔ H2CO3. What would be the effect of adding additional H2O?
#Question id: 24186
#General Aptitude