Meiosis

Question 1

Anaphase I

Answer 1

Phase in meiosis in which chromosomes are pulled apart

Question 2

Anaphase ii

Answer 2

phase in meiosis in which chromatids are pulled apart

Question 3

Aneuploidy

Answer 3

The presence of an extra chromosome or absence of one chromosome in gametes due to non-disjunction

Question 4

Bivalent

Answer 4

A pair of homologous chromosomes involved in crossing over

Question 5

centrioles

Answer 5

structures that form spindle threads during meiosis

Question 6

centrosome

Answer 6

structures that split to form 2 centrioles in animals cells during meiosis

Question 7

chiasma

Answer 7

point of overlap of chromatids during crossing over

Question 8

chromatids

Answer 8

the 2 strands that make up a chromosome

Question 9

crossing over

Answer 9

the exchange of genetic materials between chromatids of homologous chromosomes

Question 10

diploid

Answer 10

chromosome condition describing the presence of 2 sets of chromosomes in each cell

Question 11

DNA replication

Answer 11

Process by which a single stranded chromosome becomes double stranded

Question 12

Down syndrome

Answer 12

genetic disorder caused by the presence of an extra copy of chromosome 21

Question 13

Haploid

Answer 13

Chromosome conditions describing the presence of a single set of chromosomes in each cell

Question 14

Homologous

Answer 14

chromosomes that are identical in shape and appearance that code for the same set characteristics

Question 15

Interphase

Answer 15

Phase during which DNA replication takes place

Question 16

Karyotype

Answer 16

the number and type of chromosomes possessed by an individual

Question 17

Meiosis

Answer 17

• The type of cell division that results in a halving of the chromosome number.
• cell division producing daughter cells that are dissimilar

Question 18

Metaphase i

Answer 18

phase in meiosis in which chromosome line up at the equator in pairs

Question 19

metaphase ii

Answer 19

phase in meiosis in which chromosomes arranged singly at the equator

Question 20

mitosis

Answer 20

cell division producing identical cells

Question 21

non-disjunction

Answer 21

non-seperation of chromosomes or chromatids during meiosis

Question 22

polyploidy

Answer 22

the presence of an extra set of chromosomes or absence of chromosomes in gametes due to non-disjunction

Question 23

prophase i

Answer 23

phase in meiosis in which crossing over occurs

Question 24

spindle threads

Answer 24

structures to which chromosomes are attached during metaphase i and metaphase ii

Question 25

telophase i

Answer 25

phase in meiosis in which 2 cells are formed having half the chromosome complement as the original

Question 26

telophase ii

Answer 26

phase in meiosis in which four cells are formed having half the chromosome complement as the original cell