Урок 3

Question 1

Sex

Answer 1

Sexual Phenotype

Question 2

Sex Determination

Answer 2

Mechanism by which sex is established

XX female XY male.

Question 3

Pseudoautosomal regions

Answer 3

X & Y are not homologous but region where they catty same genes. In humans, at the tip.

Question 4

ZZ-ZW

Answer 4

females are ZW, males are ZZ

Question 5

Genic Sex Determination

Answer 5

Genotypes at one or more loci determine the sex of an individual

Question 6

Sequential Hermaphroditism

Answer 6

Each individual can be both male and female, although not at the same time

Question 7

Genic Balance System

Answer 7

1< female .5> male inter-sexed between

Question 8

Turner Syndrome

Answer 8

females with one X sterile, short, underdeveloped secondary sex traits

Question 9

Klinefeller’s Syndrome

Answer 9

male, posesses a Y and multiple X’s. Sterile, small balls, reduced facial & pubic hair

Question 10

Poly-X/Triple X syndrome

Answer 10

Females with 3 or more X’s. Mentally retarded, intensity increases with the number of X’s present.

Question 11

Sex Determining Region

Answer 11

Region where SRY gene is found

Question 12

SRY gene

Answer 12

determines maleness in humans

Question 13

Sex-Linked characteristics

Answer 13

trait where the gene is located on a sex chromosome and thereby linked to a sex

Question 14

Hemizygous

Answer 14

Term for men at an x linked loci

Question 15

Nondijunciton

Answer 15

When a chromosome fails to separate in anaphase I

Question 16

Dosage compensation

Answer 16

doubles activity of x chromosome in males

Question 17

Barr Body

Answer 17

1/2 randomly selected X’s in females are turned off