Science Interactive



Exercise 1: Observing Phenotype Characteristics

Data Table 1: Phenotype and Genotype

|Trait |Phenotype Characteristics |Phenotype & Genotype from |Phenotype & |Offspring |

| | |Parent 1 |Genotype(s) from | |

| | | |Parent 2 | |

|Dimpled Chin |[pic] |[pic] | | |

|[pic] | | | | |

|Free ear lobe |[pic] |[pic] | | |

|[pic] | | | | |

|Ability to taste PTC strips |[pic] |[pic] | | |

|Interlocking fingers |[pic] |[pic] | | |

|[pic] | | | | |

|Mid-digital hair |[pic] |[pic] | | |

|Bent little finger |[pic] |[pic] | | |

|[pic] | | | | |

|Window's peak |[pic] |[pic] | | |

|[pic] | | | | |

|Hitchhiker's thumb |[pic] |[pic] | | |

|[pic] | | | | |

|Blue or green eyes |[pic] |[pic] | | |

|[pic] | | | | |

|Rolled tongue |[pic] |[pic] | | |

| | | | | |

|[pic] | | | | |

Punnett Squares

Example: As described in Data Table 1, Parent 1 has the genotype Dd for the dimpled chin gene. If the recorded genotype for Parent 2 was dd, the Punnett Square would appear as follows. From this, the phenotypic and genotypic ratios may be deduced.

[pic]

IMPORTANT: Two blank Punnett squares are provided for each trait. If Parent 2 has a dominant phenotype, then you will create two Punnett squares; if Parent 2 has a recessive phenotype, then you will create one Punnett square.

|Dimpled |Parent 1 |

|Chin | |

| | | |

|Parent 2 | | | |

| | | | |

|Dimpled Chin |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Free Ear Lobe |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Free Ear Lobe |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Ability to Taste |Parent 1 |

|PTC Strips | |

| | | |

|Parent 2 | | | |

| | | | |

|Ability to Taste |Parent 1 |

|PTC Strips | |

| | | |

|Parent 2 | | | |

| | | | |

|Interlocking |Parent 1 |

|Fingers | |

| | | |

|Parent 2 | | | |

| | | | |

|Interlocking |Parent 1 |

|Fingers | |

| | | |

|Parent 2 | | | |

| | | | |

|Mid-digital Hair |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Mid-digital Hair |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Bent Little Finger |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Bent Little Finger |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Widow’s Peak |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Widow’s Peak |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Hitchhiker’s Thumb |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Hitchhiker’s Thumb |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Blue or Green Eyes |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Blue or Green Eyes |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Rolled Tongue |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

|Rolled Tongue |Parent 1 |

| | | |

|Parent 2 | | | |

| | | | |

Exercise 2: Genetic Screening – Phenotype and Genotype

Data Table 2: Karyotype for Chromosomal Disorder 1

|Karyotype |

|[pic][pic] | |

Data Table 3: Karyotype for Chromosomal Disorder 2

Note that there are 2 chromosomes present at X.

Data Table 3: Karyotype for Chromosomal Disorder 2

|Karyotype |

| | |

Data Table 4: Karyotype to Genotype to Phenotype

|# |Karyotype Image |Chromosomal Disorder |Genotype |Phenotype |

|1 |[pic] | | | |

|2 |[pic] | | | |

|3 |[pic] | | | |

|4 |[pic] | | | |

|5 |[pic] | | | |

|6 |[pic] | | | |

-----------------------

Chromosomes of Disorder 1

[pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic]

Chromosomes of Disorder 2

[pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic][pic]

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