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Punnett Squares Instruction, Practice, & Assignment 50 pts

Last updated over 6 years ago
217 questions
Watch the video about how to make Punnett Squares and use the ppts attached to the Google Classroom Assignment to practice and see how Punnett Squares are used to determine the probablity of certain alleles (genes) and their expression. After you feel confident about the ppts, complete this practice worksheet.

Don't get overwhelmed by the amount of answers. There is a lot because you have to enter the mother and father alleles in each punnett square as well as the alleles for the offspring and then give the ratios and results for genotype and phenotype.

Questions through 50 are practice. The remaining questions are for probabilities between Wizards and Muggles from the Harry Potter Series.
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Last Name First Name

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Date:

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This is a cross between two homozygous dominant alleles.
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the gene alleles
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the expression of the trait - physically looks like
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this is a cross between two homozygous recessive alleles
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this is a cross between a homozygous dominant and a homozygous ressessive alleles
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The same alleles as #20.

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The same alleles as #20.

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The same alleles as #20.

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all offspring are heterozygous, dominant allele is expressed
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cross between two heterosygous alleles
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Try the backcross shown on the ppt slides with Google Classroom assignment. A backcross is used to identify an unknown genotype of an organism expressing a dominant trait. The cross is made with a homozygous recessive pair or alleles. If the unknown genotype is homozygous for the dominant allele then all the offspring will express the dominant allele. However, if the unknown genotype is heterozygous for the dominant allele then 1/2 of the offspring will express the dominant allele and 1/2 will express the recessive allele. Complete the punnett squares to show these results.

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Since everyone in this cross has wizarding capabilities and the allele has to be recessive homozygous for the individual to have these capabilities, all of the answers 50 through 59 have to be the alleles, m m.

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Complete the punnett square by putting in the appropriate recessive alleles in all of the locations.

enter the alleles without a space between the letters
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Remember, whatever Harry was considered it would be the same for his possible siblings
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Since everyone in this cross has wizarding capabilities, the alleles have to be recessive homozygous for the individual to have these capabilities, and it is known that they are all pure bloods, all of the answers 64 through 73 have to be the alleles, mm.

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Fill in all of the punnett square with the homozygous recessive alleles.

do not put a space between the two letters
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format dictates that dominant alleles are listed first
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This is the same alleles as Question #83 above.

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The alleles for this square are the same as those in Question #85 above.

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Since everyone in this cross has wizarding capabilities and the alleles have to be recessive homozygous for the individual to have these capabilities, all of the answers 90 through 99 have to be the alleles, mm.

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Type in the correct homozygous recessive alleles for wizarding for the Punnett Square.

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refer to the Background Information if needed for the definition of purebloods
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Formatting rules state dominant alleles are placed first in the punnett squares
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parents have to be heterozygous if they have a child that is a witch
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Since everyone in this cross has wizarding capabilities and the alleles have to be recessive homozygous for the individual to have these capabilities, all of the answers 118 through 127 have to be the alleles, mm.

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Complete the punnett square with the recessive wizarding alleles.

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formatting rules state that dominant alleles are written first
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Since everyone in this cross has wizarding capabilities and the alleles have to be recessive homozygous for the individual to have these capabilities, all of the answers 145 through 154 have to be the alleles, mm.

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Complete the punnett square with the appropriate recessive wizarding alleles.

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Remember Harry's maternal grandparents were muggles
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For muggles to have wizarding children they must be heterozygous
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Formatting rules dictate that dominant alleles are listed first
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Formatting rules dictate that the dominant allele is listed first
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Formatting rules dictate that dominant alleles are written first
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From the #11 cross you just completed, is there a chance that she, Mrs. Dursley, could someday have a grandchild or greatgrandchild that had wizarding capabilities

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Since everyone in this cross is homozygous muggles, all of the answers 203 through 212 have to be the dominant alleles, MM.

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Enter the correct dominant alleles to complete the punnett squares.

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