<span>In Drosophila + indicates wild-type allele for any gene, m is mahogany and e is ebony.
Female parents are m+/m+ and males are +e/+e.
F1 are m+/+e, all wild type. F1 females are crossed with me/me males - the test cross.
Offspring will be : non recombinant m+/me, mahogany wild type or +e/me wild type ebony. OR
recombinant me/me mahogany ebony or ++/++ wild type.
As the two genes are 25 map units apart, the percentage of recombinants will be 25% and therefore percentage parental types will be 75%.
75% 1000 is 750. There are two parental types, so you would expect 375 of each. Therefore, you would expect 375 m+/me and 375 +e/me.
25% of 1000 is 250 split between two recombinants =125 of each. Therefore you would expect 135 me/me and 125 ++/++</span>
Nitrogen fixation is a process that changes nitrogen within plants and soil into"nitrogen compounds"
Explanation:
human affect biodiversity by their population numbers, use of land,and their life styles,causing damage to habits for species .Through proper education,and by demanding that governments make decisions to preserve biodiversity,the human population will be able to sustain life on earth longer.
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A dichotomous key is two paired sentences that have contrasting characteristics. That's all i know
