Variation and Inheritance Flashcards
Differences that can be seen between individual members of a species are called…
Variations
In … variation, the differences in a characteristic are clear-cut and show a … pattern
Discrete, discontinuous
In … variation there is a range of variations between the extreme of a characteristic
Continuous
Discrete variation arises because individuals carry different … of the discrete genes for the characteristic
Alleles
In continous variation, the characteristic is usually … , which means that different alleles of many different genes are involved.
Polygenic
The … of an organism is the outward appearance of a characteristic it has.
Phenotype
The … of an organism is a statement of the alleles it has for a characteristic.
Genotype
… alleles always show in the phenotype of an organism that had them.
Dominant
… alleles only show themselves in the phenotype if an organism had inherited one from each parent.
Recessive
A … organism has two copies of the same allele of a particular gene; one from each parent.
Homozygous
A … organism has inherited two different alleles of the same gene; one from each parent.
Heterozygous
What is an allele?
A form of gene
What is meant by the term discontinuous?
Alternative term for discrete variation, which is variation that is clear-cut and observable as categories
What is meant by the term discrete?
Variation that is clear-cut and observable as categories
What is meant by a dominant gene/allele?
Form of a gene that is expressed in the phenotype, whether homozygous or heterozygous
