Directions: Construct a Punnett square using the given genotype and identify its phenotype. Write your answer on your one whole sheet of paper. I. Under Mendelian Genetics, Law of Dominance Parents' Allele - E - Attached earlobes, e - unattached earlobes 1. Ee x ee 2. Ee x Ee 3. Ee x ee 4. Ee x Ee Parents' Allele - W - white skin, w - dark skin 1. Ww x Ww 2. Ww x Ww 3. Ww x ww 4. ww x Ww II. Under Incomplete Dominance Allele - C - straight hair, e - wavy hair 1. CC x ee 2. Ce x Ce 3. Ee c Ce Allele - B brown chicken, a - white chicken 1. BB x aa 2. BB x Ba 3. Aa x Ba Allele - W - white flower, f - red flower, Wf - pink flower 1. Ww x ff 2. Ww x Wf 3. Wf x Wf Allele - H - white wolf, h - black wolf. 1. HH x Hh 2. hh x hh 3. Hh x Hh
Answer (1)
In this question, we are asked to construct Punnett squares to represent different genetic crosses and to identify the resulting phenotypes under Mendelian genetics and incomplete dominance.
I. Mendelian Genetics - Law of Dominance
Attached vs. Unattached Earlobes
Cross: Ee x ee Genotypes:
E = Attached earlobes
e = Unattached earlobes
Punnett Square: [\begin{array}{c|c|c}
& e & e \ \hline E & Ee & Ee \ \hline e & ee & ee \ \end{array}]
**Phenotypes:**
* 50% Attached earlobes (Ee)
* 50% Unattached earlobes (ee)
Cross: Ee x Ee Punnett Square: E e E EE E e e E e ee
Phenotypes:
25% Attached earlobes (EE)
50% Attached earlobes (Ee)
25% Unattached earlobes (ee)
White vs. Dark Skin
Cross: Ww x Ww Genotypes:
W = White skin
w = Dark skin
Punnett Square: [\begin{array}{c|c|c}
& W & w \ \hline W & WW & Ww \ \hline w & Ww & ww \ \end{array}]
**Phenotypes:**
* 25% White skin (WW)
* 50% White skin (Ww)
* 25% Dark skin (ww)
II. Incomplete Dominance
Straight vs. Wavy Hair
Cross: CC x ee Genotypes:
C = Straight hair
e = Wavy hair
Punnett Square: [\begin{array}{c|c|c}
& e & e \ \hline C & Ce & Ce \ \hline C & Ce & Ce \ \end{array}]
**Phenotypes:**
* 100% Wavy hair (Ce) since both alleles contribute to the trait expression.
Cross: Ce x Ce
Punnett Square: [\begin{array}{c|c|c}
& C & e \ \hline C & CC & Ce \ \hline e & Ce & ee \ \end{array}]
**Phenotypes:**
* 25% Straight hair (CC)
* 50% Wavy hair (Ce)
* 25% Curly hair (ee)
This answer describes how to construct and interpret Punnett squares for predicting genotypic and phenotypic ratios in genetic crosses under Mendelian laws and incomplete dominance. It covers homework tasks involving earlobe types, skin color, and hair types to demonstrate dominant, recessive, and intermediate inheritance patterns.
