Genotype & Phenotype

Chapter 9

Click on a number in the grid to see the clue or clues for that number.
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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 11                 

Across:

1. Describes the genotype that contains two identical alleles of a particular type. (10)
2. Basic unit of inheritance, many of which make up a chromosome. (4)
4. The physical characteristics of an organism. (9)
6. Describes a pair of alleles where neither is dominant and both are expressed in the phenotype. (2,8)
8. Alternative forms of a gene that are responsible for different expressions of an inherited characteristic (7)
9. Process by which individuals best adapted to the environment survive and pass their genes onto succeeding generations. (7,9)
10. Close observation of identical twins to investigate the effect of the environment on phenotype. (4,5)
11. The set of genes possessed by an organism. (8)

Down:

1. Describes the genotype that contains two different alleles of a particular gene. (12)
3. Describes the cross between two true-breeding parents that differ from one another in one way. (10)
5. Describes the member of a pair of alleles that always show its effect and masks the presence of the recessive allele. (8)
7. Describes the member of a pair of alleles that is always masked by the dominent allele. (9)