Exam Review Essay example

For question\ 1-30 choo.;c 11ichcst atlrrvet-

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1. Thalnswmia is causcd h' n rcccssivt: auromrnrtl allele in humans. II'illl o Crll~cr
!
rvlio 113%tl~alaaccrninand a rtlothcr rcvltois n I~eteroq'gous cnr~icr oPlllis nllcle.
1111at i s the prohahilit that their first cl~ild rvill be an affcctcd lnale '? it. 115

b. J.2 c, tl

cl. 3'8
c. 3 '4

2. In 3 ~ C S ~ C I . O Sinvol~ing dihyhrid indiviclual 1-> \r hct-c \' i ~ dorninarlt to ymand
S
a lir. ;
R is dominant to r. and where t11.t:ti? o gcncs n.;sor-t independelltl!-. ir hat p p c of phsnoh~ic ratio would bt: cs~?ecfctl Plic: oflkpring !* in a. all would havc tllc samc phcnof >.pc

b. 1:2:1
c. 1:I:T:l
d. 9:3:3:t
e. 12:3:1

3. If trx-o or morc finus of'same gcnc 2sis t, the diffcscnt forms 31-cl c~IIccI:

3.
1,
1

1\v0 afl'ccted indi~riduals ino unaf ected individuals

two related individuals cl. tsvo carriers
c. trvo homoqgut es
c.

Name:
Ill":

-

5. IP n stripccf cat from a purc-breeding stc~ck wax mated to n spotted cat fi.om another purc-hresdin g stock, and IIIC rzsultant ptngcny arc 311 170th spoftc~l and striped, these nllzIes for coat pattern arc: r 3. dominant
b. reccssiva

c, cpistatic
d. codominant
c. incornpletoly dominant

6. Two indivirluals are albino duc to rcccssive mutations, n l o n they havs children, all 11nl:c normal pigmentation. Thfq b an example of:
a.

b.
c.
cl,
e.

~oclorninancc incomplete dominance plaid? monomorphism cornpl~rnentntion 7. Illiich of !lie follorvins mtios is aqsocintcd with interaction lwtn-een ~Fifrcrcnr gen cs :

8 . Tile pcnetic ratio 12.7: 1. ~sulting from an Fl dil~yhrid cross, most like!,. jndicn tcs:

cornplementa~~ action sene b, codominancc
c. dominant ~pistnsis
d. recessive epiqtnsis c, r-ecessivc lefl~ality
3.

Nnrnc:
1)
1
9.

jf:

In tllc cnsc of a conditional Eethnl allele. tempcrnturcs at rvllich lethality i s
n. perrnissi\.e

h. prohibitive
c.

restrictive

d. conditional

r, penetrant
10. ;\ genc with only onc wilrf-t!-pt: allele is termed:

11. During wl~atstngc of mitosis do scparntctl sistcr chromatids m o w to oppositr: poles '?

12. During rvhat part of rnciotic prophase I do rrcclmhinntirstr nocluIes become visihlc?

13. In ;t certain organism, n-6. 'lhis mc;tns
-.-chromusomes.
3.

b.
c.
d.
e.

3
6

12
24

none of thc n!>o\.c:

(1i;tt

its cliploid cells w o t ~ l ~ t i t ivir~l h;ltrt. oC

Narnc:

w ?:I

-

14. Thrce gcnes. 3,h and c: lie within clnse prouirnih. tn one another along the same
r.hmrnnrrrme, with h Fvin~ the micl{llr: 77ie d i c t ~ n c r in 1~etrwc-n a and 11 i q lfl
O ! ~ S I = ~ - ~ C ?of do~~lllc
M&
r,hI!c !kt iI_i~tz*llr:fr'~fl!:: h :f r ir: !5
~ I W R intc&crcnce oxVcr- ~v!?rrlc:region is : thl: croswlers hctwcen 3 3 n ~ c M I
?

M.E.,

determines ses

15 . In, I?ro.sopfrilir.

the total number of.ws clir.ornosorncs h, thc rota1 numhzt- a1 I* cliromo;somzs
c. tlic rntio o f ' S chromasornes lo I .chromosomes
'
[I, the ratio o f ? chromo(iorncs to sets o f autnsorncs i c. the rat in of Y chromosomes to w t s of autnsomes
a.

16. Ute following is dntn for offspring horn a tcstcross: n h c
66
I
I
59 a h 8 90 i h c X27 a l c
7
+ h J
5
a b -*
126
.
L

+

c

t2F

'Ill~ich the three linked genes. a h or c is in t l ~ e of middle:
a. a
h. b

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