Test Cross, Incomplete dominance, codominance

Question 1

what is a test cross used to determine
-ALWAYS preformed between which genotypes

Answer 1

-its used to determine the unknown genotype of an organism that has a dominant phenotype
-always preformed between the unknown genotype (with a dominant phenotype) and a homozygous recessive genotype

Question 2

Test cross results
-what results cause herterozygous
-what results cause homozygous

Answer 2

-if 50% are dominant and 50% recessive
-if 100% are dominant

Question 3

Incomplete dominance
-deffinition
-how many phenotypes

Answer 3

when 2 genes are equally dominant, they interact to produce a new phenotype. the lack of dominant gene.
-3

Question 4

Codominance
-what is expressed
-how many phenotypes

Answer 4

both genes are expressed at the same time
-3

Question 5

Sickle Cell trait- also known as what?
-whats HbS and HbS are said to be what?
-individuals who are HbA HbS are said to have what?
-individuals who have HbA HbA are what?

Answer 5

also known as the heterozygote advantage
-sickle cell anemia disease
-sickle cell trait, making them resistant to malaria
-normal