Family Tree Trait

Generation I

Mom's Family side

Dad's Family side

Generation II

Generation III

non-affected female

non-affected male

affected female

left over right thumb Hand clasping Mendelian Trait

affected male

Grandma Theresa

Affected Female for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely she was heterozygous dominant as she was affected. This trait was probably passed down from both or either one parent or possibly none.

• Phenotype is left thumb over right thumb
• Genotype is dominant B which she is most likely Bb

Grandpa Noe

Non-affected male for hand clasping left thumb over right thumb. The right thumb goes over the left thumb. This trait would be considered recessive. Most likely he is homozygous recessive as he wasn't affected. This trait was probably passed down from both or either one parent or possibly none.

• Phenotype is right thumb over left thumb
• Genotype is recessive b which he is most likely bb

Aunt Brenda

Affected Female for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely she is heterozygous dominant as she was affected. This trait was passed down from Grandma Theresa and carried a recessive allele.

• Phenotype is left thumb over right thumb
• Genotype is dominant B which she is most likely Bb

Uncle Alex

Affected male for hand clasping left thumb over right thumb. This trait would be considered dominant. He is dominant. This trait was probably passed down from one or both parents. He could be carrying a recessive allele like Brenda's parents.

• Phenotype is left thumb over right thumb
• Genotype is dominant B which he is most likely Bb or BB

Cousin Joseph

Affected male for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely he is dominant as he was affected. This trait was passed down from both parents since they both are dominant. Could be carrying a recessive allele.

• Phenotype is left thumb over right thumb
• Genotype is dominant B which he is most likely Bb or BB

Dad

Non-affected for hand clasping left thumb over right thumb. His right thumb goes over his left thumb. This trait would be considered recessive. Most likely he is recessive. Inherited this trait from both parents since they both carried a recessive allele.

• Phenotype is right thumb over left thumb
• Genotype is recessive b which he is most likely bb

Mom

Non-affected for hand clasping left thumb over right thumb. Her right thumb goes over her left thumb. This trait would be considered recessive. Most likely she is recessive. Inherited this trait from both parents since they both carried a recessive allele.

• Phenotype is right thumb over left thumb
• Genotype is recessive b which she is most likely bb

Grandma Jova

Affected Female for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely she was heterozygous dominant as she was affected. This trait was probably passed down from both or either one parent or possibly none.

• Phenotype is left thumb over right thumb
• Genotype is dominant B which she is most likely Bb

Grandpa Bernardo

Affected male for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely he is heterozygous dominant as he was affected. This trait was probably passed down from both or either one parent orpossibly none.

• Phenotype is left thumb over right thumb
• Genotype is dominant B which he is most likely Bb

Uncle Tito

Non-affected male for hand clasping left thumb over right thumb. Right thumb over left thumb. This trait would be considered recessive. He is recessive. This trait was probably passed down from one or both parents.

• Phenotype is right thumb over left thumb
• Genotype is recessive b which he is most likely bb

Aunt Rita

Affected Female for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely she is heterozygous dominant as she was affected. This trait was passed down from both parents.

• Phenotype is left thumb over right thumb
• Genotype is dominant B which she is most likely Bb

Cousin Christian

Affected male for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely he is dominant as he was affected. This trait was passed down from both parents since they both are dominant. Could be carrying a recessive allele.

• Phenotype is left thumb over right thumb
• Genotype is dominant B which he is most likely Bb or BB

Sister

Non-affected for hand clasping left thumb over right thumb. Her right thumb goes over her left thumb. This trait would be considered recessive. Most likely she is recessive. Inherited this trait from both our parents since they both are recessive.

• Phenotype is right thumb over left thumb
• Genotype is recessive b which she is most likely bb

Brother

Non-affected for hand clasping left thumb over right thumb. His right thumb goes over his left thumb. This trait would be considered recessive. Most likely he is recessive. Inherited this trait from both parents since they both are recessive.

• Phenotype is right thumb over left thumb
• Genotype is recessive b which he is most likely bb

Baby sister

Affected Female for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely she is heterozygous or homozygous dominant as she was affected. This trait was not passed down from both parents so she skipped a generation. Could've inherited this trait by grandparents.

• Phenotype is left thumb over right thumb
• Genotype is dominant B which she is most likely Bb or BB
• x-linked dominant

Me

Affected Female for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely she is heterozygous or homozygous dominant as she was affected. This trait was not passed down from both parents so she skipped a generation.

Affected Female for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely she is heterozygous or homozygous dominant as she was affected. This trait was not passed down from both parents so she skipped a generation.

Affected Female for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely she is heterozygous or homozygous dominant as she was affected. This trait was not passed down from both parents so she skipped a generation. Could've inherited this trait by grandparents.

• Phenotype is left thumb over right thumb
• Genotype is dominant B which she is most likely Bb or BB
• x-linked dominant

Little sister

Affected Female for hand clasping left thumb over right thumb. This trait would be considered dominant. Most likely she is heterozygous or homozygous dominant as she was affected. This trait was not passed down from both parents so she skipped a generation. Could've inherited this trait by grandparents.

• Phenotype is left thumb over right thumb
• Genotype is dominant B which she is most likely Bb or BB
• x-linked dominant

possible offsprings

Non-affected for hand clasping left thumb over right thumb. His right thumb goes over his left thumb. Recessive male.Affected for hand clasping left thumb over right thumb. Dominant male.

• Phenotype is right thumb over left thumb
• Genotype is recessive b which he is most likely bb
• Phenotype is left thumb over right thumb
• Genotype is dominant B which he could be BB or Bb