What is Inheritance

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Complete the crossword, then click on "Check" to check your answer. If you are stuck, you can click on "Hint" to get a free letter.

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Across:

1. Haphazard and lacking a pre-arranged pattern. (6)
2. Basic unit of inheritance, many of which make up a chromosome. (4)
3. Unpredictable element in a situation. (6)
4. Describing the member of a pair of alleles that always shows its effect. (8)
5. Process involving sex chromosomes which decides whether an individual will be male or female. (3,13)
8. Describing a genotype that contains 2 different alleles of a particular gene. (12)
9. Describing a genotype that contains 2 identical alleles of a particular gene. (10)
11. Branched diagram showing how the members of several generations are related to each other. (6,4)
12. The study of inherited characteristics from one generation to another. (8)
13. A fertilised egg cell. (6)
14. Thread-like structures found inside the nucleus of a cell. (10)
15. Scientific name for the fruit fly often used in genetics experiments. (10)
16. Test cross where an organism is crossed with a homozygous recessive. (9)
17. Alternative form of a gene. (6)

Down:

1. Describing the member of a pair of alleles that is always masked by a dominant allele. (9)
2. A sex cell. (6)
6. Breeding experiment involving 2 different alleles of one gene. (10,5)
7. The set of genes possessed by an organism. (8)
10. Physical appearance of an organism. (9)