AQA A level Biology topic 7 Latest 2023 Graded A+

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AQA A level Biology topic 7 Latest 2023 Graded A+ What is a dominant allele? ✔✔Allele which is always expressed in the phenotype even when theres only one copy of it What are recessive alleles... ? ✔✔Alleges that only appear in the phenotype if 2 copies are present What are codominant alleles? ✔✔Alleles that are both expressed in the phenotype because neither one is recessive If an organism carries two copies of the same allele it said to be ........ ✔✔Homozygous at the locus If an organism carries two different alleles it is said to be...... ✔✔Heterozygous at that locus What is mono hybrid inheritance? ✔✔Inheritance of a characteristic controlled by a single gene What do monohybrid crosses show? ✔✔The likelihood of the different alleles of that gene being inherited by the offspring of certain parents What type of offspring would a monohybrid cross with 2 homozygous parents produce? ✔✔Will always produce all heterozygous offspring What is a phenotypic ratio? ✔✔The ratio of different phenotypes in the offspring What is the usual phenotypic ratio you would get if you did a monohybrid cross with two heterozygous parents? ✔✔3:1 ratio of dominant:recessive characteristics What ratio would you expect to see if you did a monohybrid cross with 2 heterozygous parents involving codominant alleles? ✔✔1 : 2 : 1 What is dihybrid inheritance? ✔✔The inheritanc [Show More]

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