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Bio 140 2nd LE > Chapter 6 > Flashcards

Chapter 6 Flashcards

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Biology 101 flashcards
1
Q

t/f maleness and femaleness is determined at conception

A

t

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2
Q

t/f maleness and femaleness is determined at conception

A

t

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3
Q

t/f maleness and femaleness is determined at conception

A

t

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4
Q

t/f maleness and femaleness is determined at conception

A

t

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5
Q

t/f maleness and femaleness is determined at conception

A

t

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5
Q

t/f maleness and femaleness is determined at conception

A

t

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5
Q

t/f maleness and femaleness is determined at conception

A

t

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5
Q

t/f maleness and femaleness is determined at conception

A

t

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6
Q

t/f maleness and femaleness is determined at conception

A

t

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6
Q

t/f maleness and femaleness is determined at conception

A

t

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6
Q

t/f maleness and femaleness is determined at conception

A

t

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7
Q

t/f maleness and femaleness is determined at conception

A

t

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7
Q

t/f maleness and femaleness is determined at conception

A

t

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8
Q

on what week of the prenatal development do gender differences become apparent

A

9

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9
Q

on what week of prenatal development do all embryos develop 2 sets of unspecialized gonads

A

5

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10
Q

________ ____ develop, female structures form

A

mullerian ducts

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11
Q

_________ _____ develop, male sexual structures form

A

wolffian ducts

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12
Q

humans that have heterogametic sex with different sex chromosomes

A

male

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13
Q

humans that have homogametic sex

A

female

14
Q

t/f presence of SRY activation will lead to the development of male

A

t

15
Q

t/f absence of SRY activation will lead to the development of female

A

t

16
Q

X chromosome is (larger or smaller) than Y chromosoe

A

larger

17
Q

sequences of letters that read the same in both directions

A

palindromes

18
Q

region of the Y chromosome that comprises the 5% of the chromosome and contains genes shared with X chromosome

A

pseudoautosomal region

19
Q

region of the Y chromosome that comprises the 95% of the chromosome and contains majority of genes including SRY and AZF

A

male specific region

20
Q

what determines the sex

A

SRY gene

21
Q

what gene encodes a protein essential to producing sperm

A

AZF gene

22
Q

____________ ______ protein controls the expression of other genes; Stimulates male development; Sends signals to the indifferent gonads to destroy female structures; Stimulates development of male structures

A

transcription factor

23
Q

abnormality of an individual with both male and female sexual structures

A

hermaphroditism

24
Q

individuals whose internal structures are inconsistent with external structures, or whose genitalia are ambiguous

A

intersex

25
Q

presence of male and female structures at different stages of life

A

pseudohermaphroditism

26
Q

lack of androgen receptors which results in a person that looks female but is actually XY or vice versa

A

androgen insensitivity syndrome

27
Q

absence of DHT - penis cannot form - fetus develop externally as female

A

5-alpha reductase deficiency

28
Q

high levels of androgens - males may enter puberty as early as 3 yo; females - have deepened voice, facial hair grows, menstruation does not occur

A

congenital adrenal hyperplasia

29
Q

phenotype and sex chromosome of one gender, but identifies extremely strongly with the opposite gender

A

transgender

30
Q

refers to a male who prefers women’s clothing

A

transvestism

31
Q

t/f Identical twins are more likely to be homosexual than members of fraternal twin pairs

A

t

32
Q

Person’s phenotype and genotype are
consistent. Physical attraction is toward members of the same sex

A

homosexuality

33
Q

in what week of prenatal development does the undifferentiated structure begins to develop as testis or ovary

A

6

34
Q

strong feelings of being male or female develop

A

gender identity

35
Q

attraction to same or opposite sex

A

sexual orientation

36
Q

the proportion of males to females in a human population

A

sex ratio

37
Q

genes on the Y chromosome are said to be ________

A

y-linked

38
Q

y-linked traits are very (common or rare)

A

rare

39
Q

y/n can infertility be transmitted

A

n

40
Q

human male is considered (homozygous, heterozygous, hemizygous) for X-linked traits

A

hemizygous

Bio 140 2nd LE (2 decks)

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