Home > Subjects > Biology > Level 1 > 1.3 Genetics > Subject content
- Subject: Biology
- AS: AS90163
- Level: 1
- Credits: 3
- External
Biology 1.3 Describe the transfer of genetic information
Subject content
Make sure you have up-to-date course notes. Use them, and if you haven't got them, see your teacher. These are the topics you may be tested on:
- the roles of, and relationships between, chromosomes, genes, alleles, and DNA
- the structure and replication of DNA and its role in the transfer of genetic information (the structure is limited to double helix, molecular groups [sugar, base, phosphate] base pairing)
- mitosis and meiosis:
- purpose
- where they occur
- sequence of events (the names of stages are not required). Have a look at these animations of the stages of animal cell mitosis or AS Guru: mitosis.
- reasons for chromosome number of cells
- significance of the number of cells produced
- solution of genetic problems:
- limited to sex determination
- simple monohybrid inheritance patterns for alleles showing complete dominance
- applications of genetics:
- selective breeding
- breeding techniques
- genetic modification
- cloning
- know these terms:
- variation
- gamete
- zygote
- fertilisation
- chromosome
- karyotype
- gene
- allele
- dominant
- recessive
- homozygous
- heterozygous
- pure breeding
- genotype
- phenotype
- trait
- characteristic
- phenotype ratio
- Punnett square
- pedigree chart
- semi-conservative
To find the definitions of these terms and the concepts of genetics that you need to know, check out BBC Revision Bite – Inheritance. Note that reference is made to the monohybrid cross. This is the same as monohybrid inheritance.
