bio-genetics

Question 0

Incomplete dominance

Answer 0

One trait isn’t more dominant than the other- if heterozygous, both inherited as mixed together
Written as both recessive : ex- rw is combo of rr and ww

Question 1

Know Mendelian genetics and how to do Punnett squares/dihybrid crosses WITH GENOTYPE AND PHENOTYPE RATIOS

Answer 1

Notes

Question 2

Codominance

Answer 2

One trait isn’t more dominant than another- if heterozygous, both are shown but not mixed, just together
Written with superscripts

Question 3

Multiple allelism

Answer 3

More than one allele for a given trait

Question 4

Blood types

Answer 4

A, B, O, AB (heterozygous)

Know how to do crosses with these

Question 5

Polygenic inheritance

Answer 5

Interaction of more than one gene- several different possible phenotype
Ex: skin color, height,etc.

Question 6

Pleiotropy

Answer 6

One gene codes for multiple phenotypic affects

Question 7

Gene linkage

Answer 7

Genes that are inherited together bc they are on the same chromosome
Can occur bc of crossing over in meiosis

Question 8

Sex linkage

Answer 8

A gene that is linked to either the x or Y chromosome

Question 9

Pedigrees

Answer 9

Genetic family tree