CAIE IGCSE Biology Extended 17.4.5 Two Identical Homozygous Individuals Topic Practice

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IGCSE CAIE Biology

1. Characteristics and classification of living organisms

1.1 Characteristics of living organisms

1.2 Concept and uses of classification systems

1.3 Features of organisms

2. Organisation of the organism

2.1 Cell structure

2.2 Size of specimens

3. Movement into and out of cells

3.3 Active transport

4. Biological molecules

4.1 Biological molecules

6. Plant nutrition

6.1 Photosynthesis

6.2 Leaf structure

7. Human nutrition

7.2 Digestive system

7.3 Physical digestion

7.4 Chemical digestion

8. Transport in plants

8.1 Xylem and phloem

8.2 Water uptake

8.3 Transpiration

8.4 Translocation

9. Transport in animals

9.1 Circulatory systems

9.3 Blood vessels

10. Diseases and immunity

10.1 Diseases and immunity

11. Gas exchange in humans

11.1 Gas exchange in humans

12. Respiration

12.1 Respiration

12.2 Aerobic respiration

12.3 Anaerobic respiration

13. Excretion in humans

13.1 Excretion in humans

14. Coordination and response

14.1 Coordination and response

14.2 Sense organs

14.4 Homeostasis

14.5 Tropic responses

16. Reproduction

16.1 Asexual reproduction

16.2 Sexual reproduction

16.3 Sexual reproduction in plants

16.4 Sexual reproduction in humans

16.5 Sex hormones in humans

16.6 Sexually transmitted infections

17. Inheritance

17.1 Chromosomes, genes and proteins

17.4 Monohybrid inheritance

17.4.1—Inheritance as the transmission

17.4.2—Genotype as the genetic make-up

17.4.3—Phenotype as the observable features

17.4.4—Homozygous as having two identical

17.4.5—Two identical homozygous individuals

17.4.6—Heterozygous as having two different

17.4.7—Heterozygous individual will not be

17.4.8—Dominant allele as an allele that is

17.4.9—Recessive allele as an allele that is

17.4.10—Interpret pedigree diagrams

17.4.11—Genetic diagrams to predict

17.4.12—Punnett squares in crosses which

17.4.13—To use a test cross to identify

17.4.14—Codominance as a situation in which

17.4.15—Inheritance of ABO blood groups

17.4.16—Sex-linked characteristic as a feature

17.4.17—Red-green colour blindness

17.4.18—Genetic diagrams to predict

18. Variation and selection

18.2 Adaptive features

19. Organisms and their environment

19.1 Energy flow

19.2 Food chains and food webs

19.3 Nutrient cycles

19.4 Populations

20. Human influences on ecosystems

20.1 Food supply

20.2 Habitat destruction

20.4 Conservation

21. Biotechnology and genetic modification

21.1 Biotechnology and genetic modification

21.2 Biotechnology

21.3 Genetic modification

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