Sub-topic 1
2026 · National One-Eighth
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Mendelian inheritance — mendel's laws / monohybrid crosses
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Sub-topic 2
2025 · National One-Eighth
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Sex-linked inheritance: colour blindness genetics
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Sub-topic 3
2026 · National One-Eighth
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Punnett square size for a dihybrid cross
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Sub-topic 4
2025 · National Quarterfinal
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Test cross outcome for a homozygous dominant parent
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Sub-topic 5
2021 · National One-Eighth
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Mendel's laws and their characteristic offspring ratios
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Sub-topic 6
2021 · National Preliminary
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Riddle: genetic linkage as an exception to independent assortment
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Sub-topic 7
2026 · National One-Eighth
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Incomplete dominance, dihybrid cross terminology, and test cross phenotypic ratio
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Sub-topic 8
2026 · National Preliminary
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Processes to avoid for efficient controlled genetic crosses (true/false)
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Sub-topic 9
2024 · National Preliminary
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Genotype and phenotype of offspring from a homozygous dominant x recessive cross (true/false)
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Sub-topic 10
2023 · National Preliminary
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Riddle: mendel's law of segregation, from pea plant experiments
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Sub-topic 11
2013 · National Preliminary
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Phenotype as an organism's observable traits
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Sub-topic 12
2013 · National Preliminary
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Alleles as alternative molecular forms of the same gene
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Sub-topic 13
2013 · National Preliminary
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Homozygous dominant genotype definition
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Sub-topic 14
2013 · National Preliminary
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Dominant alleles and heritability of traits
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Sub-topic 15
2013 · National Quarterfinal
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Phenotype probability from a homozygous dominant x homozygous recessive cross
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Sub-topic 16
2013 · National Quarterfinal
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Genotypic ratio from a heterozygous x homozygous recessive cross
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Sub-topic 17
2013 · National Quarterfinal
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Number of phenotypes from a heterozygous x homozygous recessive cross
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Sub-topic 18
2013 · National Quarterfinal
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Codominance: both alleles expressed in a heterozygote
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Sub-topic 19
2013 · National Quarterfinal
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Incomplete dominance: heterozygote shows an intermediate phenotype
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Sub-topic 20
2013 · National Quarterfinal
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Genotype: the set of alleles inherited by an organism
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Sub-topic 21
2013 · National Semifinal
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Problem of the day: sex-linked inheritance, gamete types from homo/heterogametic parents
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Sub-topic 22
2014 · National Quarterfinal
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Different genotype combinations can give the same phenotype (true/false)
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Sub-topic 23
2014 · National Quarterfinal
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The dominant, not recessive, allele masks its counterpart (true/false)
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Sub-topic 24
2014 · National Quarterfinal
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Phenotype does not fully determine genotype (true/false)
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Sub-topic 25
2017 · National Quarterfinal
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Abo blood-type inheritance: a child's phenotype needn't match either parent's
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Sub-topic 26
2018 · National Preliminary
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Riddle: genetic linkage, an exception to independent assortment
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Sub-topic 27
2021 · National Preliminary
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Abo blood grouping is derived from three alleles (ia, ib, i)
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Sub-topic 28
2022 · National Preliminary
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True or false: the same phenotype may or may not be expressed from the same genotype
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Sub-topic 29
2022 · National Preliminary
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True or false: phenotypes remain the same throughout the life of the individual
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Sub-topic 30
2022 · National Preliminary
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True or false: phenotype contains hereditary characteristics passed to the next generation
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Sub-topic 31
2023 · National Preliminary
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Riddle: the law of segregation, established via mendel's pea-plant experiments
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Sub-topic 32
2023 · National Preliminary
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One of mendel's four basic concepts: a gene exists as more than one allele
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Sub-topic 33
2023 · National Preliminary
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One of mendel's four basic concepts: allele pairs separate during meiotic gamete formation
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Sub-topic 34
2023 · National Preliminary
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One of mendel's four basic concepts: every organism inherits two alleles per trait
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Sub-topic 35
2023 · National Preliminary
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One of mendel's four basic concepts: paired alleles are often dominant and recessive
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