chapter 6 = 6.1 meiosis

Question 1

genetic diversity

Answer 1

inherited genetic differences in a species that give many organisms a chance of survival

Question 2

what is genetic diversity a result of?

Answer 2

result of sexual reproduction ,which randomly sorts, or shuffles ,DNA.

Question 3

sexual reproduction

Answer 3

produces organisms. reproduction that requires 2 parents and produces offspring that are genetically different from each other , from either parent , and from another member of their species

Question 4

whats the difference between asexual and sexual reproduction

Answer 4

sexual- organisms have all been produced my sexual reproduction, requires 2 parents
asexual- which requires 1 parent and produces offspring

Question 5

give an example of genetic differences

Answer 5

visible-coat color of the llama

non-visible- owls

Question 6

crossing over

Answer 6

an event in meiosis 1 in which sister chromatids “cross over” each other and exchange DNA; results in in variation in gametes

Question 7

what happens when sister chromatids cross over

Answer 7

exchange segments of DNA , a result of it each chromosome picks up new genetic info from the other

Question 8

independent assortment

Answer 8

another important event that occurs in meiosis 1 and produces variation. homologues pairs of chromosomes separate and sort themselves into daughter cells; a shuffling of genes that contributes to variation and genetic diversity

Question 9

homologues chromosomes

Answer 9

a pair of matching chromosomes; I meiosis 1 the homologues chromosome pair separate and move to opposite poles of the cell, then the 2 daughter cells result form meiosis 1

Question 10

diploid number

Answer 10

the chromosome number in eukaryotic organisms is referred to as this. (2n) two sets of chromosomes ; the diploid number for a human cell is 46(2x23 chromosomes)

Question 11

haploid number

Answer 11

each set of inherited chromosomes is referred to as this. half the diploid number(n) ;humans inherit one set of 23 chromosomes from their female parent and set of 23 chromosomes. haploid chromosomes are carried in games

Question 12

gametes

Answer 12

specialized cells necessary for reproduction; in animals, male gametes are called sperm cells and female gametes are called egg cells

Question 13

zygote

Answer 13

the new diploid (Zn) cell formed nu the process of fertilization,which receives half its chromosomes from its female parent and half from its male parent

Question 14

embryos

Answer 14

the stage of multicellular organism that developed from a zygote

Question 15

identify the stages of meiosis

Answer 15

interphase, prophase 1, metaphase 1, anaphase 1, telephase 1, cytogenesis 1, prophase 2, metaphase 2, anaphase 2, telephase 2- page: 198