Punnett squares

[qwiz]

[h]Guided Punnett Square 1: Autosomal inheritance

[q labels=”top”] In peas, the tall allele (T) is dominant to the short allele (t). Cross a plant that is homozygous tall with a plant that is heterozygous tall.

Step 1: Determine the genotypes of the parents

Parent 1) Homozygous tall: ___ ___

Parent 2) Heterozygous tall: ___ ___

Steps 2 through 4: Complete your Punnett square. Note that for this quiz, you have to place the alleles of the gametes of the 1st parent to the left of the Punnett square, and put the alleles of the second parent’s gametes on top. On paper,you could do it in either order.

 

Parent 2
__ __
Parent 1 __ ___ ___ ___ ___
__ ___ ___ ___ ___

 

Step 5: Genotype ratio: _____ TT: ____Tt: ____tt

Step 6: Phenotype ratio: _____ Tall: ______Short

 

[l]TTHTTTT

[fx] No, that’s not correct. Please try again.

[f*] Excellent!

[l]t

[fx] No. Please try again.

[f*] Great!

[l]0%

[fx] No, that’s not correct. Please try again.

[f*] Good!

[l]25%

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[l]50%

[fx] No, that’s not correct. Please try again.

[f*] Good!

[l]75%

[fx] No, that’s not correct. Please try again.

[f*] Correct!

[l]100%

[fx] No. Please try again.

[f*] Great!

 

[/qwiz]

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