Names and deifintions of words
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Gene | A section of a chromosome (0r D.N.A ) which codes for a protein.
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| Chromosome | A collection of genes. Chromosomes are found in the nucleus of a cell.
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| D.N.A | (Deoxyribonucleic acid). This molecule is what chromosomes are made of. It can replicate (make copies of itself).
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| Alleles | Alternative forms of a gene. There are often dominant and recessive alleles for the same gene.
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| Heterozygous | A pair of alleles where there is a dominant and a recessive allele.
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| Homozygous | A pair of alleles where either both genes are recessive or both genes are dominant.
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| Dominant | A gene whose characteristic always appears even if only one copy is inherited.
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| Recessive | A gene whose characteristic only appears if copies are inherited from both parents.
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| Mutation | A ‘mistake’ in a gene or chromosome which usually occurs when it replicates.
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| Gamete | These are reproductive cells. They contain half the number of chromosomes of a body cell. Animal gametes are egg and sperm, plant gametes are pollen and ovule.
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| Mitosis | This type of cell division occurs in body cells. The chromosomes replicate so that the two new cells both have the same genetic composition as the original cell.
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| Meiosis | This type of cell division produces gametes. The chromosomes divide so that each new cell has half the number of the original cell.
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| Genotype | . The genes that an individual has
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| Phenotype | The characteristics that an individual has as a result of their genes.
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| Asexual reproduction | This is reproduction with only one parent. The offspring are clones of their parent.
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| Sexual reproduction | Reproduction where there are two parents and there is genetic recombination.
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| Clone | Clones are individuals with the same genetic make up. Identical twins are clones
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| Continuous variation | A characteristic which shows a continuous range in a population e.g height
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| Discontinuous variation | A characteristic which shows distinct groups in a population e.g blood groups.
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You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
Stephanie.oliver
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