TLS Online TPP Program

#Question id: 5355


The characteristics of X-linked inheritance as following statement are correct

A- Reciprocal crosses resulting in different phenotypic ratios in their offspring 

B- Heterozygous females transmit each X-linked allele to approximately half their daughters and half their sons

C- Males that inherit an X-linked recessive allele always exhibit the recessive trait

D-Females that inherit an X-linked recessive allele from male always exhibit the dominant trait

E- Males do not transmit each X-linked allele to their sons

#Unit 8. Inheritance Biology
  1. A, B, C only       

  2. A, B, C, E only

  3. A, C, E only  

  4. B, C, D only

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TLS Online TPP Program

#Question id: 29090

#Unit 10. Ecological Principles

The figure above shows the distribution of 10 plant species that grow along a regular environmental gradient, such as depth of the water table in a river valley. All other environmental factors are similar. This figure demonstrates that

TLS Online TPP Program

#Question id: 29091

#Unit 10. Ecological Principles

Increased solar energy, together with an abundance of water, results in high productivity of plants is an characteristics of____

TLS Online TPP Program

#Question id: 29092

#Unit 10. Ecological Principles

Based on the intermediate disturbance hypothesis, a community’s species diversity is increased by

TLS Online TPP Program

#Question id: 29093

#Unit 10. Ecological Principles

Five Hypotheses Explain How Species Richness Affects Community Services
I-Elton’s hypothesis
II-rivet hypothesis
III-Redundancy hypothesis
IV-Keystone hypothesis
V-Idiosyncratic hypothesis
a) Species that play the same roles in a community can compensate for each other if some are lost under particular conditions
b) Community services change as the number of species increases or decreases
c) there is a linear correlation between species richness and community services
d) species is an organism that helps hold the system together
e)Some species play a small but critical role in keeping the plane
Correctly match the following hypothesis with their correct  prediction;

TLS Online TPP Program

#Question id: 29094

#Unit 8. Inheritance Biology

A cross was made between pure wild type flower with white color short pollen, F1 plant was allowed to test cross to produced numerous Offspring in following number;

What is approximate distance between Flower color gene and pollen length gene?

TLS Online TPP Program

#Question id: 29095

#Unit 8. Inheritance Biology

The following table summarizes the result of a cross between two strains of Neurospora having the alleles A and a, respectively. The table shows the different patterns of octad arrangement, and the number of ascus observed of each type;

A) According to the graph first two column are from meiosis with no crossover between locus A and_____I_______ 

B) The pattern for first these two columns represent______II_______

C) The distance between the locus A and the centromere is ___III___ map units