Bio 233 reproductive systems Final exam with answers.

Bio 233 reproductive systems Final exam with answers

Chapter |27: |The |Reproductive |System |



Which |of |the |following |is |considered |a |role |of |primary |sex |organs? |- |correct |answer |-production |of |
sex |hormones



The |number |of |chromosomes |in |a |human |gamete |is |__________; |this |is |referred |to |as |a |
__________ |chromosome |number. |- |correct |answer |-23; |haploid



Genetic |variation |of |individual |chromosomes |occurs |during |__________. |- |correct |answer |-prophase
|I




All |of |the |following |things |occur |during |meiosis |I. |Select |the |statement |below |that |does |NOT |occur |
during |meiosis |I. |- |correct |answer |-The |sister |chromatids |are |separated |from |each |other.



Which |of |the |following |statements |is |true |of |metaphase |I |of |meiosis |I? |- |correct |answer |-
Homologous |pairs |align |randomly |on |the |spindle |equator |with |a |mix |of |paternal |and |maternal |
homologs |destined |for |each |of |the |daughter |cells.



Select |the |statement |which |is |true |regarding |independent |assortment. |- |correct |answer |-It |is |a |
significant |source |of |genetic |variation |only |during |meiosis |I.



Select |the |statement |which |is |FALSE. |- |correct |answer |-Meiosis |II |is |essentially |the |same |process |as |
mitosis |except |the |genetic |material |will |not |replicate |before |division |takes |place.

Meiosis |II |is |essentially |the |same |process |as |mitosis |except |the |starting |cells |are |haploid |(n).

Further |genetic |variation |typically |does |not |occur |after |meiosis |I.

*Crossing |over |is |a |source |of |genetic |variability |seen |in |meiosis |while |independent |assortment |is |a |
source |of |genetic |variability |seen |in |mitosis.

, If |gametes |were |diploid |like |somatic |cells, |how |many |chromosomes |would |the |zygote |contain? |- |
correct |answer |-Twice |the |diploid |number, |and |with |every |succeeding |generation, |the |chromosome
|number |would |continue |to |double |and |normal |development |could |not |occur.




The |constancy |of |the |chromosome |number |for |an |organism |from |one |generation |to |the |next |is |
maintained |through |________. |- |correct |answer |-meiosis



What |is |the |function |of |meiosis? |- |correct |answer |-to |produce |cells |with |half |the |chromosome |
number |of |the |original |spermatogonium |or |oogonium

Submit



At |what |point |during |meiosis |do |homologous |chromosomes |pair |up? |- |correct |answer |-prophase |I



Which |of |these |meiosis |stages |is |functionally |the |most |similar |to |mitosis? |- |correct |answer |-meiosis
|II




Why |are |the |male |testes |located |in |the |scrotum, |outside |the |abdominopelvic |cavity? |- |correct |
answer |-Spermatogenesis |is |temperature |sensitive.



During |the |preschool |examination |of |a |4-year-old |boy, |you |are |unable |to |palpate |his |testes |within |
the |scrotal |sac. |His |parents |state |that |previous |exams |have |been |normal, |and |that |the |testes |are |
clearly |visible |during |baths. |What |is |the |most |likely |explanation? |- |correct |answer |-A |chilly |
examination |room |or |your |cold |hands |have |activated |the |cremasteric |reflex.



Sperm |is |produced |in |the |__________. |- |correct |answer |-seminiferous |tubules



The |dartos |and |cremaster |muscles |are |important |to |the |integrity |of |the |male |reproductive |system. |
Which |of |the |following |best |describes |the |role |they |play? |- |correct |answer |-They |regulate |the |
temperature |of |the |testes.



The |most |important |risk |for |testicular |cancer |in |young |males |is |________. |- |correct |answer |-failure |
of |the |testis |to |make |their |normal |descent