Test Questions/Answers Flashcards Preview

Genetics Ch. 6 and 7 > Test Questions/Answers > Flashcards

Flashcards in Test Questions/Answers Deck (15)
Loading flashcards...
1
Q

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

A

Karyotype

2
Q

Chromosome abnormalities result from nondisjunction, illustrating the importance of?

A

The orderly separation and distribution of genetic material during Meiosis I

3
Q

Genetic recombination occurs during?

A

The prophase of Meiosis I

4
Q

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

A

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

5
Q

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

A

Nondisjunction of chromosomes

6
Q

Half of babies are born male and half female because?

A

Segregation of the X and Y chromosome during male meiosis

7
Q

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

A

2 alleles per trait

8
Q

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

A

Metaphase

9
Q

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

A

Nondisjunction

10
Q

Half of all human cancers have___associated with their cells

A

P53

11
Q

Sex in humans is determined by a gene called___on the __chromosome

A

SRY

Y

12
Q

A linkage group corresponds to a?

A

Group of genes on the same chromosome

13
Q

Down syndrome is caused by an extra?

A

21st chromosome

14
Q

Recombination is most likely between 2 loci that are?

A

Far apart

15
Q

Nondisjunction is caused by the production of ______cells

A

chromosomes that don’t seperate