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How to do a Punnett Square in 5 Easy Steps

How to do a Punnett Square in 5 Easy Steps. A punnett square is a chart that is used to determine the possible combinations of genes among offspring. What is a punnett square?. dominant= dimples ( D ) recessive= no dimples ( d ) Mom= pure dominant = DD Dad= hybrid = Dd.

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How to do a Punnett Square in 5 Easy Steps

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  1. How to do a Punnett Square in 5 Easy Steps

  2. A punnett square is a chart that is used to determine the possible combinations of genes among offspring. What is a punnett square?

  3. dominant= dimples (D) recessive= no dimples (d) Mom= pure dominant = DD Dad= hybrid = Dd Let’s use the trait of dimples as an example:

  4. Write the genotypes of the parents DD x Dd STEP 1:

  5. Make a punnett square STEP 2:

  6. Place one parent’s genes on the top of the punnett square and the other parent’s genes on the left side of the punnett square. STEP 3: D D D d

  7. Complete the punnett square by writing the gene combinations in the appropriate boxes. STEP 4: D D D D D D D d D D d d

  8. Write the possible genotypes and phenotypes of the offspring. genotypes: 50% DD: 50% Dd: 0% dd phenotypes: 100% dimples: 0% no dimples STEP 5: D D D DD DD d Dd Dd

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