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Gre4nikov [31]
3 years ago
10

A= big apples,r= red apples,a= small apples, andr= yellow apples. you have one tree that produces big yellow apples and another

tree that produces small red apples. when the two are crossed, you find that half of the new trees produce big red apples and half produce big yellow apples. what are the genotypes of the parents?
Biology
1 answer:
damaskus [11]3 years ago
4 0
<span>Answer:
       ....|.Ar.....|.ar.....|.Ar.....|.ar.......
   aR|.AaRr.|.aaRr.|.AaRr.|.aaRr.|
   ar.|.Aarr...|.aarr..|.Aarr...|.aarr..|
   aR|.AaRr.|.aaRr.|.AaRr.|.aaRr.|
   ar.|.Aarr..|.aarr...|.Aarr..|.aarr...| this is wrong because not all the apples are big
       ....|.Ar.....|.Ar.....|.Ar.....|.Ar.......
   aR|.AaRr.|.AaRr.|.AaRr.|.AaRr.|
   ar.|.Aarr...|.Aarr..|.Aarr...|.Aarr..|
   aR|.AaRr.|.AaRr.|.AaRr.|.AaRr..|
   ar.|.Aarr...|.Aarr..|.Aarr..|.Aarr...| This one is correct, because the offspring in the first and third line are big and red, while the second and fourth have big yellow apples so A is correct the parents are AArr and aaRr.</span>
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In a mono hybrid cross of heterozygous pea plant with round (R) yellow (Y) seeds there will be genotype ratio of 9 _____ 3,____
andreev551 [17]

Genotype ratio refers to the probability of each type of thing (in this case, round/yellow seeds) occurring based on the Punnett square. If you were to write out how many of each specific hybrid occurred in the square, you'd get:

1 RRYY

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What does this tell us? In this case, the only thing that matters is the capital letter (since that's the dominant trait and will determine whether the seed is/isn't round/yellow).

Looking at each one, you see some of them are the same - for example, RRYY and RRYy both end up as round and yellow. RrYy is too, as is RrYY.

So, you end up with 9 round and yellow; 3 round and not yellow; 3 not round and yellow; 1 not round and not yellow.

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Explanation:

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Among the option given, strong natural selection is the correct option. This is because of the fact that natural selection brings changes in the living being in terms of adaptation. The organism having better phenotypic trait will survive and reproduce. The beneficial traits will pass on to next generation may lead to evolution of new species. The members of the new species may not be able to breed with parent species.

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