'Green colour blindness' diaporamas de présentation

Refresh of Mendelian Genetics

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4 .3 Selective Breeding

4 .3 Selective Breeding. Pages 140-143. Selective Breeding. Choosing to breed plants and animals because they have desirable characteristics. Inbreeding. Mating closely related individuals to preserve characteristics. Hybridization. Dogs. Hybridization. fruit. Hybridization.

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Chapter 14

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Human Biology

Human Biology. MCQ Unit 1. 1. What is the name of this cell structure?. Golgi body Mitochondrion Lysosome Ribosome. 2. Which of the following tissues is rich in both actin and myosin. Muscle tissue Liver tissue Nerve tissue Adipose tissue. 3. Endocytosis is best described as:.

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Sex Linkage and Polygenic Inheritance

Sex Linkage and Polygenic Inheritance. Higher Human Biology. Lesson Aims. To revise sex chromosomes To examine effects of sex-linked genes To look at polygenic inheritance. Normal Body Cells. In the nucleus of every body cell there are 46 chromosomes

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Gender Determination in Humans

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Getting Involved

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Learning Objectives

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Sex-linked Inheritance

Sex-linked Inheritance. Sex chromosomes determine gender XX : female XY: male In humans the X chromosome is much larger than the Y chromosome and contains thousands of more genes Very little homologous DNA X chromosomes are responsible for many non-sexual traits.

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Gene Expression

Gene Expression. Sex-linked Genes and Crossing Over Frequencies. Sex-Linked Genes. In Mammals part of the X chromosome is homologous with the Y chromosome, but the Y is much smaller than the X so there are parts of the chromosome that have no matching part of the Y Chromosome.

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Sex Linkage

Sex Linkage . By: Taylor and Sav. Sex Linkage. 4.3.5 Sex Determination : Sex chromosomes X and Y. In humans, the chromosomes for females are homologous (XX) and non-homologous in males (XY) Shows that there will always be a 1:1 ratio of males to females.

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