heredity

Question 0

At the end of ____ there are four haploid daughter cells.

Answer 0

meiosis

Question 1

In humans, meiosis produces _________.

Answer 1

haploid cells with half the number of chromosomes

Question 2

Separation of homologous chromosomes occurs during ____

Answer 2

anaphase 1

Question 3

this events occurs during anaphase 2 of meiosis 2

Answer 3

sister chromatids separate

Question 4

during this phase of meiosis tetrads form and crossing over occurs

Answer 4

prophase 1

Question 5

mitosis and meiosis are both forms of cell division. the results are very different. meiosis results in ____ and mitosis results in _____

Answer 5

meiosis: 4 haploid cells
mitosis: 2 diploid cells

Question 6

in which stage do homologous chromosomes line up at the midline of the cell?

Answer 6

metaphase 1

Question 7

describe the most likely pattern of hemophilia in Queen Victorias offspring

Answer 7

more males have hemophilia

Question 8

dominant alleles have Capitol letters and recessive have lower case. what would be the genotype of a homozygous dominant individual?

Answer 8

both letters need to be capital & the same BB

Question 9

the law of segregation states that alleles separate during _______.

Answer 9

formation of gametes.

Question 10

the law of independent assortment applies only to genes that are _________.

Answer 10

located on different chromosomes or are far apart on the same chromosome.

Question 11

what is the general relationship between genotype and phenotype

Answer 11

genotype determines phenotype

Question 12

if two genes are closely arranged on the same chromosome, they probably will ____

Answer 12

be inherited together

Question 13

when a cross between a red flower and a white flower yields pink offspring the trait is___

Answer 13

incomplete dominance

Question 14

a scientist bred pea plants to test inheritance. he crossed pure tall plants (TT) with pure bread short plants (tt) all the offspring were tall. which law does this demonstrate?

Answer 14

law of dominance

Question 15

if a mutation occurs in an individuals body cell, then ______

Answer 15

an individuals offspring will be effected

Question 16

people with Down syndrome have 3 copies of chromosome 21. this abnormal number is caused by____

Answer 16

nondisjuction

Question 17

traits that are controlled by many genes, like hair and eye color, are known as ____

Answer 17

polygenic

Question 18

coat color in cows is codominant. a cow that is homozygous black that is crossed with a cow that is homozygous white will produce offsprings that are ___

Answer 18

black and white spots

Question 19

both sickle cell anemia and cystic fibrosis ___

Answer 19

sex linked traits ?

Question 20

chemicals in cigarettes can alter the DNA sequence causing cancer. what is the term for these chemicals?

Answer 20

mutagens

Question 21

a dihybrid cross examines ____

Answer 21

the inheritance of 2 different traits