GCSE AQA Biology 1 Variation, Genetics & Reproduction

Description

Mind map showing information about variation caused by genetic and environmental factors, genetics and sexual and asexual reproduction
Lilac Potato
Mind Map by Lilac Potato, updated more than 1 year ago
Lilac Potato
Created by Lilac Potato about 9 years ago
610
59

Resource summary

GCSE AQA Biology 1 Variation, Genetics & Reproduction
  1. Variation
    1. Genetic
      1. Characteristics similar to parents'
        1. Genes inherited from parents
        2. Some genes from mother, some from father
          1. No 2 members of species identical (apart from identical twins)
          2. Environmental
            1. Differences that have been caused by conditions organism lives in
            2. Characteristics affected by genetic & environmental factors...
            3. Genes, chromosomes and DNA
              1. Cells have nucleus - contains genetic info in form of chromosomes
                1. Human cell nucleus contains 23 pairs of chromosomes
                  1. Chromosomes carry genes - genes control development of different characteristics
                    1. Gene is short length of chromosome, which is long length of DNA - can be diffferent versions of same gene (alleles)
                      1. DNA coiled up to form arms of chromosome
              2. Sexual reproduction
                1. Fusion of male & female gametes - 2 parents so offspring contain mixture of parents' genes
                  1. Each gamete contains 23 chromosomes
                    1. When fertilised, form cell with full number of chromosomes
                  2. Offspring inherits features from both parents - produces variation
                  3. Asexual reproduction
                    1. Only 1 parent
                      1. No fusion of gametes
                        1. No mixing of chromosomes/no genetic variation
                          1. Offspring are genetically identical (clones)
                            1. How plant & animals grow/produce replacement cells
                              1. Some organisms produce offspring using asexual reproduction (bacteria & certain plants)
                              Show full summary Hide full summary

                              Similar

                              Biological Definitions
                              Yamminnnn
                              Function and Structure of DNA
                              Elena Cade
                              AQA Biology 12.1 cellular organisation
                              Charlotte Hewson
                              AS Biology Unit 1
                              lilli.atkin
                              AQA AS Biology Unit 2 DNA and Meiosis
                              elliedee
                              AQA Biology 11.2 mitosis
                              Charlotte Hewson
                              AQA AS Biology Unit 2 The Cell cycle
                              elliedee
                              AQA AS Biology Unit 2 The Variety of Life
                              elliedee
                              Lung Structure
                              Elena Cade
                              AQA Biology 11.1 replication of DNA
                              Charlotte Hewson
                              AQA Biology 3.3 Structure of an epithelial cell
                              Charlotte Hewson