Apologia Bio Module 8

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Created by:

ngio64  on November 11, 2009

Subjects:

biology

Classes:

Apologia, Apologia Biology, Giordano Academy of Excellence

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Apologia Bio Module 8

True breeding
If an organism has a certain characteristic that is always passed on to its offspring, we say that this organism bred true with respect to that characteristic. (228)
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True breeding If an organism has a certain characteristic that is always passed on to its offspring, we say that this organism bred true with respect to that characteristic. (228)
Allele (uh leel') One of a pair of genes that occupies the same position on homologous chromosomes (233)
Genotype (jee' nuh tipe) Two-letter set that represents the alleles an organism possesses for a certain trait (234)
Phenotype (fee' nuh tipe) The observable expression of an organism's genes (234)
Homozygous (ho muh zy' gus) genotype A genotype in which both alleles are identical (234)
Heterozygous (het uh roh zy' gus) genotype A genotype with two different alleles (234)
Dominant allele An allele that will determine phenotype if just one is present in the genotype (234)
Recessive allele An allele that will not determine the phenotype unless the genotype is homozygous in that allele (234)
Mendel's Principles of Genetics (using updatedterminology) - (235)1.)The trait of an organism are determined by its genes 2.) Each organism has two alleles that make up the genotype for a given trait 3.) In sexual reproduction, each parent contributes ONLY ONE of its alleles to its offspring 4.) In each genotype, there is a dominant allele. If it exists in an organism, the phenotype is determined by that allele
Pedigree A diagram that follows a particular phenotype through several generations (238)
Monohybrid cross A cross between two individuals, concentrating on only one definable trait (242)
Dihybrid cross A cross between two individuals, concentrating on two definable traits (242)
Autosomes Chromosomes that do not determine the sex of an individual (247)
Sex chromosomes Chromosomes that determine the sex of an individual (247)
Antigen A protein that, when introduced in the blood, triggers the productions of an antibody (251)
Autosomal inheritance Inheritance of a genetic trait not on a sex chromosome (253)
Genetic disease carrier A person who is heterozygous in a recessive genetic disorder (253)
Sex linked inheritance - Inheritance of a genetic trait located on the sex chromosomes (254)
Mutation A radical chemical change in one or more alleles (254)
Change in chromosome structure A situation in which a chromosome loses or gains genes during meiosis (254)
Change in chromosome number A situation in which abnormal cellular events in meiosis lead to either none of a particular chromosome in the gamete or more than one chromosome in the gamete (255)

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