Unit 2 Pt 2 Word Wall

Recessive Allele

• The allele that is hidden by the dominant allele

  Lowercase letter

  ex) b, f, a

• The allele that expresses its trait even in the presence of a recessive allele

• A type of allele that is always dominant

• An allele that can be represented by uppercase letters

Pedigree

• 
• A type of genetic mutation

• A method of gene editing

• A form of genetic engineering

Dominant Allele

• The "stronger" allele that hides a recessive allele

• An allele that is always expressed regardless of the other allele

• An allele that is only expressed in the homozygous condition

• An allele that has no effect on the phenotype

Codominance

• A type of dominance where one allele completely masks the other

• A type of dominance where both alleles are expressed equally

• A type of dominance where the phenotypes blend

• A type of dominance that only occurs in plants

Polygenic

• A trait controlled by more than one gene

• A trait controlled by a single gene

• A trait that is inherited from one parent

• A trait that is not influenced by genetics

Complete Dominance

• A form of dominance where the dominant allele completely hides the recessive allele when both are present.

• A situation where both alleles are expressed equally in the phenotype.

• A type of genetic dominance that occurs only in homozygous conditions.

• A form of dominance where the recessive allele is expressed in the phenotype.

Heterozygous

• Two IDENTICAL alleles in a genotype

• Two DIFFERENT alleles in a genotype

• One dominant and one recessive allele

• A genotype with no alleles present

Homozygous

• 2 of the SAME alleles in a genotype

• 2 different alleles in a genotype

• Only one allele present in a genotype

• No alleles present in a genotype

Phenotype

• Physical characteristics of an individual based on Genotype

• Genetic makeup of an individual

• Environmental influences on an organism

• Behavioral traits of an individual

Genotype

• DNA sequence of an individual

  ex) BB, Bb, or bb

• Physical appearance of an organism

  ex) Tall or short

• Type of environment an organism lives in

  ex) Terrestrial or aquatic

• Type of genetic mutation present

  ex) Point mutation or frameshift