Download Heredity Review Sheet - Heredity: the passing of ______ from one

Heredity Review Sheet
- Heredity: the passing of _________ from one generation to another.
- Traits: the ________________ inherited from parents to offspring.
- Gregor Mendel: studied pea plants using diagrams called ____________, to
cross plants to see how traits are passed from __________________________.
Mendel concluded that traits follow a _________________________________.
- Variations: Name 4 variations Mendel observed during his experiments
1.____________________
2. _______________________
3.____________________
4. _______________________
- Dominant: a gene that __________ shows up; represented by a capital letter, B.
** Whenever a capital letter is present, the dominant gene will appear.
- Recessive: a gene that ___________ shows up; represented by a little letter, b.
** In order for a recessive trait to be seen, both alleles must be little, bb.
- Heterozygous: (aka ____________) when two alleles are different, Bb.
*Hetero= different
- Homozygous: (aka ___________) when two alleles are alike, BB or bb.
*Homo= same
- Genotype = Genes
- Phenotype = Physical
ex: BB
ex: Brown Eyes
-Punnett Squares
*Genotypes are places on
tops and sides
25%
25%
¼
¼
*One letter is brought
inside to fill box
- Punnett Squares show _____________________ of genes.
- Must be able to identify all of the genotypes and phenotypes in the square.
Asexual Reproduction
Sexual Reproduction
Definition:
Definition:
Process:
Process:
Example:
Example:
Advantages
Advantages
Disadvantages
Disadvantages
- Females: XX
-Males: XY
*Each parent gives ____________ chromosome to their offspring.
- Humans:
Egg (sex) cells= 23 chromosomes ( ½ of total )
Sperm (sex) cells= 23 chromosomes ( ½ of total )
Body cells= 46 chromosomes
- Sex-linked Traits: usually occur more often in ________ than _________.
Usually controlled by the X chromosome.
- Example: Color-blindness
- DNA: aka _________________________
*Everyone has unique DNA, no two people are exactly the same.
* Only exception is identical twins, and they still have some differences.