cell division

Question 1

what does each body cell or somatic cell of every organism have

Answer 1

its own distinct number of chromosomes

Question 2

what do we ,mean by somatic cells

Answer 2

all the cells in plant and animal body , besides sex cells

Question 3

how are chromosomes arranged

Answer 3

in pairs

Question 4

how many pairs of chromosomes are in there in humans

Answer 4

23 pairs

Question 5

what are the 22 different pairs of chromosomes called

Answer 5

autosomes

Question 6

what are the pair of sex chromosomes called

Answer 6

gonosomes

Question 7

how are the two chromosomes making up each pair

Answer 7

they are identical to each other

Question 8

in females the sex chromosomes are referred to as

Answer 8

xx chromosomes

Question 9

in males the sex chromosomes are referred to as

Answer 9

xy chromosomes

Question 10

why do we say cells has a diploid number of chromosomes

Answer 10

because there are two sets of 23 different kinds of chromosomes in each somatic cell

Question 11

why do we say gametes have a haploid number of chromosomes

Answer 11

gametes have just one set of 23 different chromosomes

Question 12

note that

Answer 12

the two chromosomes making up each pair of autosomes are identical

Question 13

where does a member of each pair come from

Answer 13

from maternal origin ( comes from the mothers) and paternal origin( from the fathers)

Question 14

homologous pair of chromosomes

Answer 14

a pair of identical chromosomes one of maternal origin and the other of paternal origin

Question 15

how do chromosomes appear after dna replication

Answer 15

they appear double , each being made up of two chromatids being held together by a centromere