A three point test cross was carried out in Drosophila melanogaster involving three adjacent incomplete link genes A, C and B arranged in the same order. The distance between A to C is 20 map units (mu) and that between B to C is 10 map. If pure line Drosophila AAbbCC crosses with aaBBcc to produce F1 offspring were allowed to cross with aabbcc result in 1000 offspring, which of the following genotype combination with number is correct?

Genotype	Number
I- Aabbcc	a- 90
II- aabbCc	b-40
III- AaBbCc	c-10

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#Question id: 12372

#Unit 10. Ecological Principles

In a particular case of secondary succession, three species of wild grass all invaded a field. By the second season, a  single species dominated the field. A possible factor in this secondary succession was

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#Question id: 31254

#Unit 5. Developmental Biology

What molecular marker of head inducer is found in the hypostome of the hydra during head regeneration?

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#Question id: 12667

#Unit 10. Ecological Principles

Which of the following is true?

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#Question id: 4941

#Unit 11. Evolution and Behavior

Which of the factors below weaken the hypothesis of abiotic synthesis of organic monomers in early Earthʹs atmosphere?

1.  the relatively short time between intense meteor bombardment and appearance of the first life forms

2.  the lack of experimental evidence that organic monomers can form by abiotic synthesis

3.  Uncertainty about which gases comprised early Earthʹs atmosphere

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#Question id: 27929

#Unit 11. Evolution and Behavior

Which of the following phenomenon could be used to directly examine genetic variation?

a) RPLC

b) RFLP

c) DNA sequencing

d) NPLC