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Inheritance and Body Defence

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Across
2.Male gamete
4.Chemical that transfers genetic information between living things
7.Product of fertilisation
8.Ball of cells formed by division of a zygote
9.A living thing in the early stages of development
12.The physical appearance of an individual
15.The process that takes place when the sperm and ovum nuclei fuse
17.Resistant to disease
18.Tiny hair-like structures which help to remove mucus away from the lungs
19.An unborn mammal, in humans from 8 weeks after fertilisation
Down
1.structures, visible during cell division, that are made of DNA and protein. Humans have 46
3.The genetic information contained in an individuals DNA
5.Chemicals produced by white blood cells which attach to microbes and clump them together
6.A treatment which helps your body develop immunity against disease
10.A living thing which can only be seen using a microscope
11.Basic unit of inheritance that codes for protein formation
12.Organ in female mammals which supplies food and oxygen to, and removes waste from, the foetus
13.A disease causing organism
14.Female gamete
16.Protective liquid found in the mouth, nose, airways and other body openings

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