TLS Online TPP Program

#Question id: 12486


Which of the following process occur in prometaphase?

#Unit 2. Cellular Organization
  1. Chromosomal material condenses to form compact mitotic chromosomes.
  2. Chromosomes are seen to be composed of two chromatids attached together at the centromere.
  3. Cytoskeleton is disassembled, and mitotic spindle is assembled, and nuclear envelope disassemble.
  4. Chromosomal microtubules attach to kinetochores of chromosomes and chromosomes are moved to spindle equator.
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TLS Online TPP Program

#Question id: 3269

#Unit 9. Evolution & Diversity of Life Forms

Two plant species live in the same biome but on different continents. Although the two species are not at all closely related, they may appear quite similar as a result of

TLS Online TPP Program

#Question id: 3270

#Unit 9. Evolution & Diversity of Life Forms

Heterozygote advantage should be most closely linked to which of the following?

TLS Online TPP Program

#Question id: 3271

#Unit 9. Evolution & Diversity of Life Forms

Consider hemophilia A, a clotting disorder caused by an X-linked recessive allele with a frequency (q) of approximately 1 in 10,000. The frequency of the disease among females and among male respectively

TLS Online TPP Program

#Question id: 3272

#Unit 9. Evolution & Diversity of Life Forms

Calculate the frequencies of the XO and X+ alleles respectively for this population.

TLS Online TPP Program

#Question id: 3273

#Unit 9. Evolution & Diversity of Life Forms

The number of forward mutations is equal to the number of reverse mutations then

a) Population is in equilibrium for forward and reverse mutation rates

b) The population is being in Hardy–Weinberg equilibrium

c) No further change in allelic frequency

TLS Online TPP Program

#Question id: 3274

#Unit 9. Evolution & Diversity of Life Forms

The common edible frog of Europe is a hybrid between two species, Rana lessonae and Rana ridibunda. The hybrids were first described in 1758 and have a wide distribution, from France across central Europe to Russia. Both male and female hybrids exist, but when they mate among themselves, they are rarely successful in producing offspring. What can you infer from this information?