The cards Question Where do the two alleles an offspring inherits for a gene come from? Tap to flip Answer One from each parent. Question What is an allele? Tap to flip Answer A different version of a gene, created by a genetic variant. Question What is an organism's genotype? Tap to flip Answer The combination of alleles it has for a characteristic. Question What is an organism's phenotype? Tap to flip Answer Its physical characteristics. Question How many dominant alleles must be in the genotype for a dominant characteristic to show in the phenotype? Tap to flip Answer One or two. Question How many recessive alleles must be in the genotype for a recessive characteristic to show in the phenotype? Tap to flip Answer Two. Question Besides genotype, what else can affect some phenotypes? Tap to flip Answer The environment. Question When an individual has a dominant and a recessive allele, is the recessive allele lost? Tap to flip Answer No, it is still present in the genotype; the dominant allele is the one expressed. Question Do recessive alleles lead to proteins being produced, as dominant alleles do? Tap to flip Answer Yes; proteins are produced from both dominant and recessive alleles. Question Are most characteristics controlled by a single gene? Tap to flip Answer No; most are influenced by several genes, though some are determined by just one. Question What is a Punnett square? Tap to flip Answer A model showing how alleles are inherited from parents by their offspring. Question What is a gamete? Tap to flip Answer A sex cell (sperm or egg) carrying half the genetic information needed for an individual. Question What can a Punnett square be used to predict? Tap to flip Answer The proportion of genotypes or phenotypes in the offspring, or the probability of them occurring. Question How does a Punnett square describe offspring genotypes? Tap to flip Answer As homozygous or heterozygous. Question Does the genotype of one offspring change the probability for the next offspring of the same parents? Tap to flip Answer No; each instance of sexual reproduction is independent. Question What does a family tree diagram show? Tap to flip Answer Whether a characteristic was passed from parents to offspring; it is a model of inheritance. Question What is another name for a family tree diagram? Tap to flip Answer A pedigree. Question When can a family tree be used to work out a person's genotype? Tap to flip Answer When their phenotype and their relatives' genotypes are known. Question What is inheritance? Tap to flip Answer The passing of genetic information from parents to offspring by reproduction. Question What is a trait? Tap to flip Answer A specific characteristic that is part of an organism's phenotype. Question Which organism did Mendel use to study inheritance? Tap to flip Answer Pea plants. Question In which decades did Mendel carry out his inheritance investigations? Tap to flip Answer The 1850s and 1860s. Question Give one trait Mendel studied in pea plants. Tap to flip Answer For example flower colour or seed texture. Question Before Mendel, what did scientists think happened to traits during sexual reproduction? Tap to flip Answer That they blended. Question What did Mendel show about traits instead of blending? Tap to flip Answer That traits were dominant and recessive. Question What did Mendel call the heritable units he suggested caused traits? Tap to flip Answer 'Factors'. Question In which year was DNA discovered? Tap to flip Answer 1869. Question In which year was DNA associated with inheritance? Tap to flip Answer 1943. Question In which year was the structure of DNA worked out? Tap to flip Answer 1953. Question In recent decades, what have scientists found to be important to study, rather than just individual genes? Tap to flip Answer Whole genomes. Question What is DNA? Tap to flip Answer A molecule made of nucleotides that contains the genetic code for making proteins. Question What determines an individual's biological sex during sexual reproduction? Tap to flip Answer The chromosomes they inherit. Question Which pair of human chromosomes are the sex chromosomes? Tap to flip Answer The 23rd pair. Question Which sex chromosomes do human females have? Tap to flip Answer XX. Question Which sex chromosomes do human males have? Tap to flip Answer One X and one Y (XY). Question What does a gene on the Y chromosome trigger the development of? Tap to flip Answer The testes. Question What are male sex hormones called? Tap to flip Answer Androgens. Where this deck sits in the curriculum Curriculum National Curriculum for England Stage GCSE (Years 10–11) Course GCSE Biology Unit Inheritance, genotype and phenotype Exam boards AQA, Edexcel, OCR Tiers foundation and higher England's National Curriculum sets what is taught; the units and their order are Oak National Academy's. Flash Feed is not affiliated with Oak or any exam board.
How this deck was checked On 2026-11-02, every card was compared with its source: the lessons of Oak National Academy, a public body funded by England's Department for Education that publishes lessons for the national curriculum. Because the cards come from those lessons, no second source was sought. The comparison was done automatically, not by a teacher, so a card can still be wrong. Flash Feed is not affiliated with any source named here.
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A Biology lesson by Oak National Academy licensed under Open Government Licence (OGL)
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