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WorksheetsHEREDITY
Total questions: 10
Worksheet time: 4mins
The genetic makeup of an organism in term of the alleles present ( e.g. Tt or GG).
Phenotype
Genotype
Recessive
Dominant
Having two identical alleles of a particular gene. Two identical homozygous individuals that breed together will be pure-breeding.
Recessive
Dominant
Homozygous
Heterozygous
Having two different alleles of a particular gene, not pure- breeding. Represented by 1 Capital letter and 1 small letter (e.g. Bb, Cc, Rr, Tw, Tb, Cs)
Recessive
Dominant
Homozygous
Heterozygous
An allele that is expressed if it is present. Expressed in capital letters (e.g. T or G).
Recessive
Dominant
Punnett Square
Genotype
Which is the correct way to complete the Punnett square?
Which is the correct way to set up the Punnett square if Dad is heterozygous (Bb) and Mom is homozygous dominant (BB)?
If mom and dad both have blue eyes, what is the probability of their child having brown eyes?
(B = Brown eyes, b = blue eyes)
25%
50%
0
100%
If dad is homozygous recessive (bb) and mom is homozygous dominant (BB),
what is the probability of their child having brown eyes?
(BB & Bb = Brown eyes while bb = blue eyes)
100%
75%
50%
25%
When is the trait for recessive allele appear as phenotype?
if both allele is recessive
If one allele is recessive
if there is no recessive allele present
Diagram showing the gene combinations that might result from a genetic cross
Punnett Square
Punnett Circle
Punnett Triangle
Punnett Diamond
