Genetics

Incomplete dominance

• One allele is not completely dominant over another

A heterozygous genotype is a mix of the two…

phenotypes

Incomplete means Red parent plus White Parent equals

Pink child!

Codominance

• Both alleles contribute to the phenotype
    -both alleles are dominant

in codominance heterozygous phenotypes show..

heterozygous phenotypes shows both traits

Which of the following best describes how fur color is determined in a Siamese cat?

Fur color is determined by a gene that codes for a protein and by the temperature of the environment. (CODOMINANCE)

What do the letters inside the grid of a punnet square represnt?

predicted genotypes of offspring

During the formation of gametes (sex cells), the two alleles for a trait separate, ensuring that each gamete carries only one allele for that trait. This is called _______________.

The Law of Segregation

During gamete formation, the alleles of different genes assort independently of one another, meaning the inheritance of one trait doesn't influence the inheritance of another. This is called ______________.

The Law of Independent Assortment

What is the relationship between genes, chromosomes, and DNA? Make sure to define the role of each in the relationship.

Genes, the basic units of heredity, are segments of DNA, which are packaged into structures called chromosomes, carrying genetic information

If a trait is passed down by two unaffected parents, but affects males only, than it is likely-

sex-linked recessive

If we say that the mode of inheritance of a gene is autosomal, that means-

The gene is located on chromosomes 1-22 (not sex chromosomes)

When a trait is sex-linked, that means that it is-

A gene that is on either the x or y chromosome