Ch. 5 Vocab Flashcards Preview

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Flashcards in Ch. 5 Vocab Deck (12):
1

Dominant trait

The trait observed in the first generation when parents that have different traits are bred.

2

Recessive trait

A trait that reappears in the second generation after disappearing in the first generation when the parents with different traits were bred

3

Gene

One set of instructions for an inherited trait

4

Allele

One of the alternative forms of a gene that governs a characteristic, such as hair color.

5

Phenotype

An organisms appearance or other detectable characteristic

6

Genotype

The entire genetic makeup of an organism.

7

Probability

The likelihood that a possible future event will occur in any given instance of the event

8

Heredity

The passing of genetic traits from parent to offspring.

9

Homologous chromosomes

Chromosomes that have the same sequence of genes and the same structure

10

Meiosis

A process in cell division during which the numbers of chromosomes decreases to half the orginal number by two divisions of the nucleus, which results in the production of sex cells

11

Sex chromosomes

One of the pair of chromosomes that determines the sex of an individual

12

Pedigree

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