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Sagot :
Answer:
so in the punnet square, you hvae the 4 squares inside the big on. on top of the square, you have 2 letters, representing the dominant and the repressed genes. On one side, typically the left, you have another two letters, again genes. to get the gene types to fill in your squares, you take the first letter of the top set and the first letter of the side set. for this example, we are going to use Bb(top) and BB(side). you would take the B from the top, and you would pu it with the B from the side. in the top left square, you should have BB. next, you go and take that same top B and do it with the second letter of the side, B again. this again gives you BB. next, you take the second letter of the top, b, and you join it with B. in the top right square, you would write or type in Bb. Even though the b was on top, it is after the B because in this cause, it is not the dominant gene. when you do the second top and side letters together, you again get Bb.
Explanation:
the main points.
- in this example, i used B to be the dominant gene and b to be the repressed/ submissive gene.
- you always put the dominant gene letter before the repressed
- make sure you fill the squares in properly.
- in this one, you should have 3 BB and 1 Bb. this shows that the gene set BB is going to show
- when you fill in the squares, the first top letter and the first side letter fill in the top left square.
- the first top letter and the second side letter go left bottom.
- second top letter and first side letter go in right top.
- second top and second side go in right bottom.
- always place the dominant gene first in the punnet square.
add me and message me if you need more help. we can also zoom to figure it out.
The Punnett square is a square diagram that is used to predict the genotypes of a particular cross or breeding experiment. It is named after Reginald C. Punnett, who devised the approach. The diagram is used by biologists to determine the probability of an offspring having a particular genotype.
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