reproduction

Question 1

list the characteristics of sexual reproduction

Answer 1

2 parents
variation
slow
high energy

Question 2

list the characteristic soy asexual reproduction

Answer 2

1 parent
no variation
fast
low energy

Question 3

define mitosis

Answer 3

cell division that produces body cells

Question 4

what does mitosis produce

Answer 4

2 genetically identical daughter dipoid daughter cells

Question 5

define misois

Answer 5

cells division that produces gamets

Question 6

what does meiosis produce

Answer 6

4 different haploid daughter cells

Question 7

describe why meiosis is important

Answer 7

it produces variation

Question 8

describe why variation is important

Answer 8

allows population of species to cope with environmental changes

Question 9

what is DNA

Answer 9

a double helix molecule (protein) contained within chromosomes

Question 10

what is a chromosome

Answer 10

x shaped molecules that contain long strands of DNA

Question 11

what is a gene

Answer 11

section of DNA that codes for a characteristic

Question 12

define genotype

Answer 12

entire genetic material of an organism

Question 13

define phenotype

Answer 13

an organisms visible characteristic

Question 14

define allele

Answer 14

different forms of the same gene

Question 15

define dominant allele

Answer 15

phenotype is expressed if one ales is inherited

Question 16

define recessive allele

Answer 16

two alleles need to be inherited for the phenotype to be expressed

Question 17

define homozygous

Answer 17

two identical alleles

Question 18

define heterozygous

Answer 18

two different alleles

Question 19

what is polydactyl

Answer 19

inherited disorder
extra digits
caused by dominant allele

Question 20

what is cystic fibrosis

Answer 20

inherited disorder
poor fiction of cell membranes
recessive allele

Question 21

name the two type of embryo screening

Answer 21

amniocentesis and chronic villus sampling

Question 22

describe what happens during amnicentesis

Answer 22

fluid from around the placenta are take.

fluid contains cells that can be screened

Question 23

describe what happens during chorionic villus sampling

Answer 23

tissues sample dorm the placenta are taken.

tissues contain cells that can be screened

Question 24

give the advantages of embryo screening

Answer 24

detects genetic disorders
reduces health care costs and multiple pregnancies
identifies healthy embryos

Question 25

give disadvantages of embryo screening

Answer 25

expensive
increase risk of miscarriage
parents have to make difficult decisions
designer babies