Science 8, Chapter 3, Test Flashcards Preview

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Flashcards in Science 8, Chapter 3, Test Deck (10):

What is a Pedigree?

A pedigree is a diagram that shows the occurrence of a genetic trait in several generations of a family


What is Heredity?

Heredity is the passing of genetic traits from parents to offspring


What is a Dominant Trait?

A dominant trait is a trait observed in the first generation when parents that have different traits are bred


What is a Recessive Trait?

A recessive trait is a trait the reappears in the second generation after disappearing in the first generation when parents with different traits are bred


What is an allele?

An allele is one of the alternative forms of an organism;


What is a phenotype?

The phenotype is the organism's appearance of other detectable property or characteristic


What is a genotype?

A genotype is the entire genetic makeup of an organism;
Also the contribution of genes for one or more specific traits


What is probability?

the likelihood that a future event will occurring in an giving instance of an event


Why are self-pollinating and cross-pollinating pea plans important?

Self-Pollinating- to avoid cross pollination disorders
Cross-pollinating- to determine dominant and recessive traits


What is a sex chromosome?

A sex chromosome is a chromosome that determines the se of an individual