Inheritance Lab Report
Name: Breanna Simmons
Date:
Purpose
To develop and apply an understanding of Mendelian inheritance patterns and Punnett squares.
Materials and Methods
Read the Inheritance Lab Background materials. No other materials are required for this lab. You
will observe a variety of phenotypic characteristics in yourself and record these in the table in the
Results section below. Using the logic of Mendelian genetics, record your possible genotypes, as
well as your parents’ possible genotypes. Do not refer to your parent’s phenotypes in order to
infer the possible crosses that could have led to your phenotype.
Complete the following steps, and record your findings in the table in the Results section.
1. Record each of your phenotypes in the Your Phenotype column. Identify your phenotype
using a single letter for each trait as indicated below (capital letter indicates dominant
allele, lowercase indicates recessive allele):
• E – free earlobes; e – attached earlobes
• D – dimples; d – no dimples
• T – able to roll tongue; t – not able to roll tongue
• F – second toe longer than big toe; f – second toe shorter than big toe
• W – widow’s peak; w – no widow’s peak
2. Identify and record your possible genotypes based on your phenotypes. Genotypes are
represented using two alleles. Identify the alleles using the letters indicated below (capital
letter indicates dominant allele, lowercase indicates recessive allele):
• E – free earlobes; e – attached earlobes
• D – dimples; d – no dimples
• T – able to roll tongue; t – not able to roll tongue
• F – second toe longer than big toe; f – second toe shorter than big toe
• W – widow’s peak; w – no widow’s peak
3. Using your possible genotypes, identify and record all of the possible pairings of parental
genotypes that could have led to your possible genotypes. Crosses are denoted in this
form: FF x Ff and indicates the genotypes of both parents.
© 2024 Walden University, LLC
Inheritance Lab Report - 1
Name: Breanna Simmons
Date:
Purpose
To develop and apply an understanding of Mendelian inheritance patterns and Punnett squares.
Materials and Methods
Read the Inheritance Lab Background materials. No other materials are required for this lab. You
will observe a variety of phenotypic characteristics in yourself and record these in the table in the
Results section below. Using the logic of Mendelian genetics, record your possible genotypes, as
well as your parents’ possible genotypes. Do not refer to your parent’s phenotypes in order to
infer the possible crosses that could have led to your phenotype.
Complete the following steps, and record your findings in the table in the Results section.
1. Record each of your phenotypes in the Your Phenotype column. Identify your phenotype
using a single letter for each trait as indicated below (capital letter indicates dominant
allele, lowercase indicates recessive allele):
• E – free earlobes; e – attached earlobes
• D – dimples; d – no dimples
• T – able to roll tongue; t – not able to roll tongue
• F – second toe longer than big toe; f – second toe shorter than big toe
• W – widow’s peak; w – no widow’s peak
2. Identify and record your possible genotypes based on your phenotypes. Genotypes are
represented using two alleles. Identify the alleles using the letters indicated below (capital
letter indicates dominant allele, lowercase indicates recessive allele):
• E – free earlobes; e – attached earlobes
• D – dimples; d – no dimples
• T – able to roll tongue; t – not able to roll tongue
• F – second toe longer than big toe; f – second toe shorter than big toe
• W – widow’s peak; w – no widow’s peak
3. Using your possible genotypes, identify and record all of the possible pairings of parental
genotypes that could have led to your possible genotypes. Crosses are denoted in this
form: FF x Ff and indicates the genotypes of both parents.
© 2024 Walden University, LLC
Inheritance Lab Report - 1
