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

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1

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

Karyotype

2

Chromosome abnormalities result from nondisjunction, illustrating the importance of?

The orderly separation and distribution of genetic material during Meiosis I

3

Genetic recombination occurs during?

The prophase of Meiosis I

4

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

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

5

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

Nondisjunction of chromosomes

6

Half of babies are born male and half female because?

Segregation of the X and Y chromosome during male meiosis

7

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

2 alleles per trait

8

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

Metaphase

9

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

Nondisjunction

10

Half of all human cancers have___associated with their cells

P53

11

Sex in humans is determined by a gene called___on the __chromosome

SRY
Y

12

A linkage group corresponds to a?

Group of genes on the same chromosome

13

Down syndrome is caused by an extra?

21st chromosome

14

Recombination is most likely between 2 loci that are?

Far apart

15

Nondisjunction is caused by the production of ______cells

chromosomes that don't seperate