Question

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Explanation:

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Question 1 Corrections & Follow-Ups

Step1: Classify genotypes (He/Ho)

Heterozygous (He): different alleles; Homozygous (Ho): same alleles.

• TT: Ho, Bb: He, DD: Ho, Ff: He, tt: Ho, dd: Ho
• Dd: He, ff: Ho, Tt: He, bb: Ho, BB: Ho, FF: Ho

Step2: Identify purebred (homozygous)

Purebred = homozygous genotypes: TT, DD, tt, dd, ff, bb, BB, FF

Step3: Identify hybrids (heterozygous)

Hybrids = heterozygous genotypes: Bb, Ff, Dd, Tt

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Question 2 (Verified Correct)

Step1: Body color phenotypes

Yellow (dominant) = YY, Yy; Blue (recessive) = yy

• YY: Yellow, Yy: Yellow, yy: Blue

Step2: Shape phenotypes

Square (dominant) = SS, Ss; Round (recessive) = ss

• SS: Square, Ss: Square, ss: Round

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Question 3 Corrections

Step1: Tall/short genotypes

Tall (dominant) = TT, Tt; Short (recessive) = tt

• Tall: TT, Tt; Short: tt

Step2: Body color genotypes

Pink (dominant) = PP, Pp; Yellow (recessive) = pp

• Pink body: PP, Pp; Yellow body: pp

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Question 4

Step1: Define parent genotypes

SpongeBob (heterozygous square): $Ss$; SpongeSusie (round): $ss$
Gametes: SpongeBob = $S, s$; SpongeSusie = $s, s$

Step2: Complete Punnett Square

	$S$	$s$
$s$	$Ss$	$ss$

Step3: List offspring genotypes/phenotypes

Genotypes: $Ss, ss$; Phenotypes: Square ($Ss$), Round ($ss$)

Step4: Calculate square shape probability

$\frac{2}{4} = 50\%$

Step5: Calculate round shape probability

$\frac{2}{4} = 50\%$

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Question 5

Step1: Define parent genotypes

Both heterozygous pink: $Pp$
Gametes: Each parent = $P, p$

Step2: Complete Punnett Square

	$P$	$p$
$p$	$Pp$	$pp$

Step3: List offspring genotypes/phenotypes

Genotypes: $PP, Pp, pp$; Phenotypes: Pink ($PP, Pp$), Yellow ($pp$)

Step4: Calculate pink body probability

$\frac{3}{4} = 75\%$

Step5: Calculate yellow body probability

$\frac{1}{4} = 25\%$

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Answer:

1. Genotype classification:

• TT: Ho, Bb: He, DD: Ho, Ff: He, tt: Ho, dd: Ho
• Dd: He, ff: Ho, Tt: He, bb: Ho, BB: Ho, FF: Ho

Purebred: TT, DD, tt, dd, ff, bb, BB, FF
Hybrids: Bb, Ff, Dd, Tt

1. Phenotypes:

• YY: Yellow, Yy: Yellow, yy: Blue
• SS: Square, Ss: Square, ss: Round

1. Possible genotypes:

• Tall: TT, Tt; Short: tt
• Pink body: PP, Pp; Yellow body: pp

1. A. Genotypes: $Ss, ss$; Phenotypes: Square, Round

B. 2 out of 4 or 50%
C. 2 out of 4 or 50%

1. A. Genotypes: $PP, Pp, pp$; Phenotypes: Pink, Yellow

B. 3 out of 4 or 75%
C. 1 out of 4 or 25%