Inheritance (A-level only) (3.7.1) | AQA A-Level Biology - (7402) | KnowledgeSet

Inheritance (A-level only)

Biology · A-Level · AQA · AQA A-Level Biology - (7402) · Specification point · 3.7.1 · Genetics, populations, evolution and ecosystems (A-level only)

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3.7.1 Inheritance (A-level only)

Content	Opportunities for skills development
$The genotype is the genetic constitution of an organism. The phenotype is the expression of this genetic constitution and its interaction with the environment. There may be many alleles of a single gene. Alleles may be dominant, recessive or codominant. In a diploid organism, the alleles at a specific locus may be either homozygous or heterozygous. The use of fully labelled genetic diagrams to interpret, or predict, the results of: monohybrid and dihybrid crosses involving dominant, recessive and codominant alleles crosses involving sex-linkage, autosomal linkage, multiple alleles and epistasis. Use of the chi-squared (Χ²) test to compare the goodness of fit of observed phenotypic ratios with expected ratios.$	$AT h Students could investigate genetic ratios using crosses of Drosophila or Fast Plant® MS 0.3 Students could use information to represent phenotypic ratios in monohybrid and dihybrid crosses. MS 1.4 Students could show understanding of the probability associated with inheritance.$

Content

Opportunities for skills development

The genotype is the genetic constitution of an organism. The phenotype is the expression of this genetic constitution and its interaction with the environment. There may be many alleles of a single gene. Alleles may be dominant, recessive or codominant. In a diploid organism, the alleles at a specific locus may be either homozygous or heterozygous. The use of fully labelled genetic diagrams to interpret, or predict, the results of: monohybrid and dihybrid crosses involving dominant, recessive and codominant alleles crosses involving sex-linkage, autosomal linkage, multiple alleles and epistasis. Use of the chi-squared (Χ²) test to compare the goodness of fit of observed phenotypic ratios with expected ratios.

AT h Students could investigate genetic ratios using crosses of Drosophila or Fast Plant® MS 0.3 Students could use information to represent phenotypic ratios in monohybrid and dihybrid crosses. MS 1.4 Students could show understanding of the probability associated with inheritance.