Lesson 12: Variation and inheritance

Hi,

These powerpoint slides will definitely help you understand the topic better. the 30 slides are very relevant in covering the following concepts:

• variation, continuous and discontinuous
• chromosomes-consists of genes in a linear arrangement
• DNA-chromosomes are made of this acid molecule
  
• gene-a section of chromosome that carries a coded info for controlling a trait
• allele-one 2 or more alternative forms of gene
• replication-process of making identical copies of chromosome/gene
• mitosis-duplication of cells for growth, repair and asexual reproduction
  
• meiosis-producing haploid gametes for sexual reproduction
• gametes-haploid sex cells such as sperm, ovum
• fertilisation-joining of a male and a female gamete during sexual reproduction
  
• zygote- a diploid product of fertilisation
  
• diploid cell-cell with 2 sets of chromosomes
• haploid cell- cell with only one set of chromosomes
• genotype-description when both alleles are present for a particular trait
• phenotype- a visible trait shown by an organism
• heterozygous-having 2 different alleles for a particular trait
• homozygous-having 2 identical alleles for a particular trait
• dominant-a type of allele that is expressed even when there is only one copy present
• recessive- a type of allele that is only expressed expressed when partnered with another like itself
• monohybrid cross-simple breeding experiment to study the inheritance of a single gene
• differences between continuous and discontinuous variation
• short questions
  

Variation And Inheritance

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