Across
- 1. When a cell has half the usual number of chromosomes.
- 4. A mode of inheritance in which a mutation in a gene on the X chromosome causes the phenotype.
- 6. A change that occurs in a DNA sequence due to mistakes when the DNA is copied or as the result of environmental factors.
- 8. A diagram that shows the occurrence and appearance of phenotypes of a particular gene.
- 12. A variation of a gene that will produce a certain phenotype, even in the presence of other alleles.
- 13. A diagram that is used to predict the genotypes of a particular cross or breeding experiment.
- 14. Alleles only showing their effect if the individual has two copies of the allele.
Down
- 2. The observable physical characteristics of an organism, including the appearance and behaviour
- 3. Having inherited two different forms of a particular gene from each parent.
- 5. The individual inherits identical forms of a particular gene from each parent.
- 7. One of two or more versions of a gene.
- 9. The change in characteristics of a species over several generations due to the process of natural selection.
- 10. A person/organism that has inherited a recessive allele and does not display that trait.
- 11. an organism’s complete set of heritable genes which determine the characteristics that are physically expressed