Ch. 12 Vocab Flashcards Preview

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Flashcards in Ch. 12 Vocab Deck (27):
1

True breeding

Allowed to self pollinate

2

Trait

A characteristic

3

Hybrids

Offspring that are crosses of parents with different traits

4

Genes

Chemical factors that determine traits

5

Alleles

Different forms of a gene

6

Segregation

Separation

7

Gamete

The sex cells

8

Probability

Likelihood that an event will occur

9

Punnett square

A diagram showing genetic crosses

10

Homozygous

Organism that has 2 identical alleles

11

Heterozygous

An organism that has 2 different alleles for the same trait

12

Phenotype

Physical characteristic

13

Genotype

Genetic makeup

14

Independent assortment

Genes that separate independently and do not influence each other's inheritance

15

Incomplete dominance

One allele is not completely dominant over another

16

Codominance

Both alleles contribute to the phenotype

17

Polygene traits

Having many genes

18

Homologous

4 male chromosomes have 4 corresponding female chromosomes

19

Diploid

Two sets

20

Haploid

One set

21

Meiosis

A process of reduction division in which the number of chromosomes per cell is cut in half

22

Tetrad

Pairs of corresponding chromosomes

23

Crossing over

Exchanging portions of chromatids

24

Gene map

record of the DNA sequence of a gene

25

Genetics

The scientific study of heredity

26

Fertilization

Male and female reproductive cells join

27

Multiple alleles

Genes have more than two alleles