How would Earth be different without the greenhouse effect?
2 answers:
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Answer:
1: Burning of fossil fuel
2: Deforestation
3: Waste disposal in landfills
Explanation:
Burning of fossil fuel is the one of the primary cause of increased level of carbon dioxide in air. Deforestation refers to uncontrolled cutting down of trees which in turn increases the level of carbon dioxide in air. Plants are the natural resources that remove the carbon dioxide from air through the process of photosynthesis. Waste disposals in landfills emits methane which is one of the greenhouse gas.
So let's call the allele that is dominant for purple stems is P, and the recessive allele yielding green stems is p. And let's say that the allele that is dominant for red fruit is R and the recessive allele for yellow fruit is r.
The two plants are each heterozygour for both traits, meaning that the cross is going to be:
PpRr x PpRr
So let's setup a Punnet Square:
The genotypic ratios (alleles) and phenotypic ratios are as follows:
PPRR (Purple stem, Red fruit):
PpRR (Purple stem, Red fruit): or
ppRR (Green Stem, Red fruit):
PPRr (Purple stem, Red fruit): or
PPrr (Purple stem, Yellow fruit):
PpRr (Purple stem, Red fruit): or
pprr (Green stem, Yellow fruit):
ppRr (Green stem, Red fruit): or
Pprr (Purple stem, Yellow fruit): or
So then we take the like phenotypic ratios and add them together:
Purple stem, Red fruit:
Green stem, Red fruit:
Purple stem, Yellow fruit:
Green stem, Yellow fruit: