One hypothesis that explains the result is : A) Two genes are involved with 12:3:1 epistasis, such that A_B_ and A_bb are black, aaB_ is brown,and aabb is green.
Explanation:
- This is a case of Dominant Epistasis.
- When two genes are involved and presence of dominant allele of one gene masks the effect of either allele of the second gene then the epistasis is termed as dominant epistasis.
- In the given case black :brown: green ratio is approximately equal to 12:3:1.
- Here presence of a dominant A allele that is responsible for the black colour masks the effect of either allele of B. Therefore A_B_ and A_bb produces black beetles
- Again , absence of dominant A allows B to express itself and Brown beetles are produced thus aaB_ is brown.
- When both the genes are present as recessive alleles, neither brown nor black colour is expressed and the beetles are green.Thus, aabb are green.
Answer: Likewise in pteridophytes, species also produces haploid spores through haploid stage. In diploid stage the two spores fuse together to form a prothallus which is a diploid stage. Hence, the similarity in the reproductive cycle of fungus and a pteridophyte is that both organisms produce haploid spores and exhibit diploid and haploid stages.
Explanation:
Mass extinctions. Dinosaurs is the most recent (?)
Explanation:
Issen Sengeki... Messatsu!
The answer is 2.
<em>"Weakness is a disease... I am the cure! When I walk, I walk alone. When I fight, I fight alone. The path of a weak coward is into the bowels of hell! Death is the only destination for life. Better die a free brave man."</em>
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<em>- Akuma</em>
Answer:
Yes, it is possible to get shingles more than once.
Explanation:
Women are more likely to have shingles a second time more than men.
The longer the post herpetic neuralgia ( pain after shingles) the higher the chances of recurrence.
If shingles comes back, it may occur on another side of the body. This is because, once you have had chicken pox, the virus remains in the nerve. When the virus then reactivates the infected nerves become inflamed and when the virus reaches the skin, the rash appears.
