Genetics

Front 1

1. INCOMPLETE DOMINENCE

Back 1

1. INCOMPLETE DOMINENCE- PINK
-Blended expression

Front 2

2. CODOMINANCE-

Back 2

2. CODOMINANCE-EXPRESSION OF BOTH ALLELES
-Both inherited alleles are expressed

Front 3

3. MULTIPLE ALLELES-

Back 3

3. MULTIPLE ALLELES-Blood A, B, AB, O
IA, IB, i ( bc it is recessivive when expressed with I)

Front 4

4. EPISTASIS-

Back 4

4. EPISTASIS- ALBINO
One gene affects the phenotypic expression of a second gene.
A single gene turns on ( or off) the production of pigment.
Albino-One gene turns off the production of a pigment.

Front 5

5. PLEIOTROPY-

Back 5

5. PLEIOTROPY- SICKLE CELL
A single gene has more than one phenotypic expression.
A wrinkled seed has a LOW starch production
-sickle cell-allele incorrectly codes for hemoglobin, that causes a rbc to be sickle shaped.

Front 6

6. POLYGENIC INHERITANCE-

Back 6

6. POLYGENIC INHERITANCE- HEIGHT
Traits are expressed in a range of varieties.
There is an interaction of many genes to shape a single phenotype.

Front 7

7. LINKED GENES

Back 7

7. LINKED GENES
-They reside on the same chromosome and cannot segregate independently because they are physically connected.

Front 8

8. SEX LINKED-

Back 8

8. SEX LINKED- HEMOPHILIA
Defective gene resides on X chromosome

Front 9

9. X-INACTIVATION-
1. Example
2. Explain WHY it occurs

Back 9

9. X-INACTIVATION- CALICO CAT
A chromosome remains coiled in a compact body ( barr body)= inactive.
If black patch inactivated, then yellow patch activated.

Front 10

10. ANEUPLOIDY

Back 10

10. ANEUPLOIDY= extra or missing chromosome
-Down Syndrome=3 copies of chromosome 21 ( trisomy 21)
-Turner Syndrome= Non disjunction of sex chromosome- XO