Meiosis notes

Question 1

Meiosis

Answer 1

Cell division that produces reproductive cells in sexually reproducing organisms

Question 2

Recessive

Answer 2

Genes that are expressed in offspring only when inherited not masked from both parents, i.e. When Inherited from one parent.

Question 3

Mitosis

Answer 3

division of the nucleus

Question 4

Fertilization

Answer 4

Fusion of an egg and sperm cell

Question 5

Homologous Chromosomes

Answer 5

Chromosomes that have the same sequence of genes and the same structure

Question 6

Non-Homologous Chromosomes

Answer 6

chromosomes that are not members of the same pair.

Question 7

Gametes

Answer 7

reproductive cells

Question 8

Sister Chromatids

Answer 8

Replicated forms of a chromosome joined together by the centromere and eventually separated during mitosis or meiosis.

Question 9

Centromere

Answer 9

the region of the chromosome that holds the two sister chromatids together during mitosis.

Question 10

Independent Assortment

Answer 10

Chromosomes will arrange in a different pattern each time. (Mixes the mom and dad chromosomes)

Question 11

Crossing Over

Answer 11

Process in which homologous chromosomes exchange portions of their chromatids.

Question 12

Allele

Answer 12

Different forms of a gene

Question 13

Recessive

Answer 13

An allele that is masked when a dominant allele is present

Question 14

Spindle Fibers

Answer 14

Protein structures which move the chromosomes during cell division.

Question 15

Haploid

Answer 15

having a single set of unpaired chromosomes

Question 16

Diploid

Answer 16

a cell that contains two haploid sets of chromosomes

Question 17

Homozygous

Answer 17

having two identical alleles for a trait

Question 18

Heterozygous

Answer 18

having two different alleles for a trait

Question 19

Non-disjunction

Answer 19

the uneven division of chromosomes during meiosis I or II that results in cells w/ more or less chromosomes than normal. *Not a mutation