ch 27 smartbook missed questions

Question 1

a single-celled fertilized eggs is called a

Answer 1

zygote

Question 2

a mature female gamete an eggs is aka

Answer 2

ovum

Question 3

genetically persons lacking a __ chromosome are classified as females

Answer 3

Y

Question 5

human offspring receive genes from 2 parents this is called

Answer 5

biparental

Question 6

primary sex organs of the male are the

Answer 6

testes

Question 7

in males choose all that are considered secondary sex organs

Answer 7

• ducts that convey sperm
• glands that contribute to semen
• penis

Question 8

traits that are commonly regarded as male secondary sex characteristics

Answer 8

• muscular physique
• pitch of the voice
• coarse and visible hair on torso and limbs
• facial hair

Question 9

choose all that are sex chromosomes

Answer 9

• Y chromosome
• X chromosome

Question 10

match each male characteristic with its homologous structure in the female

Answer 10

• penis —> clitoris
• scrotum —> labia majora
• testes —> ovaries

Question 11

each human cell normally contains __ pair of sex chromosomes

Answer 11

1

Question 12

choose all that are found in both a male and female 6 week embryo

Answer 12

• urogenital folds
• labioscrotal folds
• genital tubercle

Question 13

choose all that are true of the inguinal canal

Answer 13

• it is anterior to the public symphysis
• it is a path through the groin
• it is created by the gubernaculum and the vaginal process

Question 14

the penic is homologous to the ___ of the female

Answer 14

clitoris

Question 15

when does descent of the testes begin

Answer 15

week 6

Question 16

which condition results from the testes failing to descend

Answer 16

cryptorchidism

Question 17

functions of nurse cells

Answer 17

• provide growth factors to germ cells
• provide nutrients to germ cells

Question 18

what are 4 effects of dihydrotestosterone (DHT)

Answer 18

1. increased sebum secretion
2. development of facial hair
3. darkening of skin
4. development of pubic hair

Question 19

puberty in boys usually occurs around what age range

Answer 19

10 to 12

Question 20

during prophase 1 homologous chromosomes exchange segments of DNA in a process called

Answer 20

crossing over

Question 21

during crossing-over

Answer 21

genetic variation is introduced as closely aligned homologous chromosomes swap alleles with each other

Question 22

stem cells in gonodal ridges that will become sperm cells are called

Answer 22

spermatogonia

Question 23

sensory neurons of the penis travel along which 3 of the following nerves

Answer 23

• internal pudendal nerves
• sacral nerves
• dorsal nerves