Bio lab quiz 5

Question 1

gene

Answer 1

a factor of inheritance for a particular trait or characteristic

Question 2

alleles

Answer 2

different forms of genes

Question 3

genotype

Answer 3

genetic makeup of an organism ex. Rr or GgHH

Question 4

phenotype

Answer 4

physical appearance ex. purple seed, tall seedlings

Question 5

frequency

Answer 5

proportion of 1 thingto total population ranges from 0-1 and add up to 1 all together

ex. 56 kids 30 w freckles 26 without (26/56) = 0.46 (30/56)= 0.56
0. 46+0.54=1

Question 6

genotypic frequency

Answer 6

0.5Dd, 0.25DD, 0.25dd

Question 7

phenotypic frequency

Answer 7

0.75 green seeds, 0.25 white seeds

Question 8

Ratio

Answer 8

proportion of one type of thing to another *divide all #’s in series by the lowest #
lowest in series is 1, colon seperates them
ex. 26 freckled students
30 non freckled students
(26/26): (30/26)
1 freckled: 1:15 non freckled

Question 9

Genotypic ratio

Answer 9

1DD:2Dd:1dd

Question 10

phenotypic ratio

Answer 10

3 green seeds: 1 white seed

Question 11

Mendels 1 law

Answer 11

alleles separate during the formation of gametes

ex. organism with genotype Bb can make gametes with genotype B or b

Question 12

Mendels 2 law

Answer 12

alleles can assort independently this means organism DdEe can make gametes with genotype DE,De,dE,de and all gametes are equally likely
* this assumes genes are located on separate chromosomes

Question 13

2 uses for test crosses

Answer 13

1. determine if genes are on same ( gene linkage) or different (independent assortment) chromosomes
2. determine unknown genotype

Question 14

crossing over

Answer 14

the recombination process in meiosis in which chromatids exchange segments

Question 15

recombinant

Answer 15

phenotype with a different combination of traits from those of the original parents