Test Questions/Answers

Question 1

The diagnosis of Down Syndrome is made by examining the individuals?

Answer 1

Karyotype

Question 2

Chromosome abnormalities result from nondisjunction, illustrating the importance of?

Answer 2

The orderly separation and distribution of genetic material during Meiosis I

Question 3

Genetic recombination occurs during?

Answer 3

The prophase of Meiosis I

Question 4

Many chromosome abnormalities are not involved in the human population because?

Answer 4

They are lethal and can cause spontaneous abortion of the embryo in early development

Question 5

Trisomy and monosomy can result from accidents that occur during meiosis during?

Answer 5

Nondisjunction of chromosomes

Question 6

Half of babies are born male and half female because?

Answer 6

Segregation of the X and Y chromosome during male meiosis

Question 7

200 alleles exist in the population yet each persons has at most?

Answer 7

2 alleles per trait

Question 8

The optimal time to observe size and shape of chromosomes is during?

Answer 8

Metaphase

Question 9

A person with Klinefelters Syndrome has YY chromosomes and 3 sex chromosomes (XXY), the resulting aniplody is caused by?

Answer 9

Nondisjunction

Question 10

Half of all human cancers have___associated with their cells

Answer 10

P53

Question 11

Sex in humans is determined by a gene called___on the __chromosome

Answer 11

SRY

Y

Question 12

A linkage group corresponds to a?

Answer 12

Group of genes on the same chromosome

Question 13

Down syndrome is caused by an extra?

Answer 13

21st chromosome

Question 14

Recombination is most likely between 2 loci that are?

Answer 14

Far apart

Question 15

Nondisjunction is caused by the production of ______cells

Answer 15

chromosomes that don’t seperate