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Human karyotype 1.How many pairs of chromosomes are there? 2.How many chromosomes does a human cheek cell contain? 3.How many chromosomes does a human.

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Presentation on theme: "Human karyotype 1.How many pairs of chromosomes are there? 2.How many chromosomes does a human cheek cell contain? 3.How many chromosomes does a human."— Presentation transcript:

1 Human karyotype 1.How many pairs of chromosomes are there? 2.How many chromosomes does a human cheek cell contain? 3.How many chromosomes does a human ovum contain? 4.How are the chromosomes arranged? 5.What is the sex of this person? 6.Reason for your answer:

2 Human karyotype The chromosomesare arranged according to size. There are 23 pairs of chromosomes. Chromosomes are arranged in homologous pairs.

3 Human karyotype The chromosomes are arranged according to size. There are 23 pairs of chromosomes. Chromosomes are arranged in homologous pairs.

4 arranged according chromosomes are The size. to are arranged pairs. Chromosomes in homologous easiermore difficult

5 1.How many pairs of chromosomes are there? 2.How many chromosomes does a human cheek cell contain? 3.How many chromosomes does a human ovum contain? 4.How are the chromosomes arranged? 5.What is the sex of this person? 6.Reason for your answer: 23 pairs A cheek cell is a normal body cell, therefore it contains 23 pairs of chromosome, i.e. 46 chromosomes An ovum is a gamete, therefore it contains only 23 chromosomes in homologouspairs. male In humans a sex chromosome arrangement of XY is male (XX is female)


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