Predicting Inheritance: Test Crosses A test cross can be used to deduce the genotype of an unknown individual that is expressing a dominant phenotype The individual in question is crossed with an i...
Predicting Inheritance: Dihybrid Crosses Monohybrid crosses look at how the alleles of one gene transfer across generations Dihybrid crosses look at how the alleles of two genes transfer across gen...
Predicting Inheritance: Monohybrid Crosses Monohybrid inheritance looks at how the alleles for a single gene are passed on from one generation to the next Known information about the genotypes, phe...
Key Terms in Genetics Genes & alleles The DNA contained within chromosomes is essential for cell survival Every chromosome consists of a long DNA molecule which codes for several different prot...
Meiosis: Sources of Genetic Variation Having genetically different offspring can be advantageous for natural selection Meiosis has several mechanisms that increase the genetic diversity of gametes ...
Identifying the Stages of Meiosis Cells undergoing meiosis can be observed and photographed using specialised microscopes The different stages of meiosis have distinctive characteristics meaning th...
Meiosis in Animal & Plant Cells Meiosis is a form of nuclear division that results in the production of haploid cells from diploid cells It produces gametes in plants and animals that are used ...
Homologous Chromosomes In diploid cells there are two complete sets of chromosomes in the nucleus Chromosomes have a characteristic shape They have a fixed length The position of the centromere is ...
Haploid & Diploid Cells A diploid cell is a cell that contains two complete sets of chromosomes (2n) These chromosomes contain the DNA necessary for protein synthesis and cell function Nearly a...
