Biology Final-dominance/evolution/fungi

What is genetics

• Different forms of a gene

• The study of heredity -(biological inheritance patterns and variation)

What are alleles?

• Different forms of a gene

• Only dominent genes

• Only recessive genes

What is the law of dominence?

• is never expressed; represented by an uppercase letter

• is expressed 

    only when dominant allele is 

    not present; represented by

         lowercase letter

    

• is always 

    expressed; represented by

    uppercase letter

What is the Law of Segregation?

•  genes that segregate independently do not

    influence each other’s inheritance.

  - helps account for the many genetic variations

          observed in many sexually reproducing organisms

• during the production of gametes the two copies of each hereditary factor segregate so that offspring acquire one factor from each parent

What is the law of Independent Assortment?

• Each gene is made up of any combination of two alleles (one from each parent) to produce different characteristics.

• alleles separate during meiosis

• Genes for different traits are inherited independently of each other

Describe the difference between dominant and recessive alleles. (not a question..both answers true)

• Some alleles are dominant, meaning they ultimately determine the expression of a trait.

• Other alleles are recessive and are much less likely to be expressed

What is the difference between genotype and phenotype? (not a question, both answers are correct)

• A key difference between phenotype and genotype is that, whilst genotype is inherited from an organism's parents, the phenotype is not.

• Whilst a phenotype is influenced the genotype, genotype does not equal phenotype.

Which answers are possible genotypes

• homozygous dominant

• homozygous recessive

• heterozygous

• All 3 are correct

What do the letters inside the grid of a Punnett square represent?

• phenotypes of parents

• genotypes of offspring

• testcrosses of offspring

• chromosomes

The law of independent assortment states that allele pairs separate dependently with one another.

• True

• False