Exam/Quiz Corrections

Question 1

P1, F1, F2

Answer 1

the parental generation, first filial generation, second filial generation

Question 2

What is an allele an alternative form of

Answer 2

a single gene

Question 3

When are dominant alleles expressed

Answer 3

when they’re present

Question 4

How many alleles are there for one gene

Answer 4

two alleles

Question 5

Y represents what

Answer 5

a dominant allele

Question 6

y represents what

Answer 6

a recessive allele

Question 7

Homozygous organism

Answer 7

organism with two of the same alleles for a particular trait (YY or yy)

Question 8

Heterozygous organism

Answer 8

organism with two different alleles for a particular trait (Yy)

Question 9

Genotype

Answer 9

an organism’s allele pairs (Yy, yy)

Question 10

phenotype

Answer 10

the observable characteristics of an allele pair

Question 11

Mendel’s law of segregation

Answer 11

two alleles for each trait separate during meiosis. During fertilization, two alleles for that trait unite, producing heterozygous organisms called hybrids

Question 12

monohybrid cross

Answer 12

a cross that involves hybrids for a single trait

Question 13

dihybrid cross

Answer 13

a cross that involves the inheritance of two or more traits

Question 14

Law of independent assortment

Answer 14

random distribution of alleles occurs during gamete transformation

Question 15

Homologous chromosomes line up on equator of the cell

Answer 15

Metaphase I

Question 16

Chromosomes are at the poles, two new nuclei are formed around chromosomes. After this phase two cells are formed.

Answer 16

Telophase I

Question 17

Homologous chromosomes pair up, crossing-over occurs.

Answer 17

Prophase I

Question 18

Sister chromatids separate

Answer 18

Anaphase II

Question 19

Homologous chromosomes separate

Answer 19

Anaphase I

Question 20

Sister chromatids are at the poles, 4 new nuclei form around them. After this phase 4 haploid daughter cells are formed.

Answer 20

Telophase II

Question 21

Chromosomes line up on equator of the cell

Answer 21

Metaphase II

Question 22

Chromosomes become visible, spindle fibers form, nucleus disappears.

Answer 22

Prophase II

Question 23

A cell containing two full sets of chromosomes (one from father and one from mother).

Answer 23

diploid

Question 24

A cell containing only one set of chromosomes (half the DNA).

Answer 24

Haploid

Question 25

What are the 8 phases of meiosis in order?

Answer 25

PMAT, PMATII

Question 26

How many chromosomes are in a human gene

Answer 26

23

Question 27

How many chromosomes are in a human and human zygote

Answer 27

46

Question 28

Suppose you are trying to predict the offspring of two plants, knowing that they are both heterozygous. What percentage of the offspring will be homozygous recessive?

Answer 28

25%

Question 29

Suppose you are trying to predict the offspring of two plants, knowing that they are both heterozygous. What percentage of the offspring will be homozygous dominant?

Answer 29

50%

Question 30

The building blocks of DNA are called:

Answer 30

nuleotides

Question 31

Which of the following is not found in DNA?: adenine, uracil, thymine, guanine

Answer 31

uracil

Question 32

The complimentary bases in DNA are joined by:

Answer 32

hydrogen bonds

Question 33

Suppose you run a DNA analysis and determine that the genome consists of 20% thymine. How much guanine makes up the genome?

Answer 33

60%