@v
/
Be_abletg:
1.) Createpunnettsquares
usingthe followingdominantandrecessive
traits(you
you will beprovidedwith a key for each
don't needto memorizethesebecause
problem):
- Eye Color(Browneyes: B, blueeyes: b)
- Ear lobes@reeearlobes: F',attachedearlobes- a )
(Righthanded: R, left handed: I )
- . Dominanthandedness
- Chin (Cleft chin: C, no cleft chin- c )
- s)
- Height (Tallness: T, shortness
- Hair line (Widow'speak- W, no widow's peak: w )
- Dimples(Smiledimples- D, no smiledimples- d)
- Hair (Curlyhair; C, straighthair : s )
2.) Takethe descriptionsof parentsallelesandproperlyplacethe allelesin a punnett
square(Example:The maleis heterozygous
for browneyesandthe femaleis
homozygous
for blueeyes)
B
b
tt. I
3.) Determineprobabilitiesof whatthe offspringwill be,basedon the punnettsquare
(Example:50o/ochanceof beinghetero4ygous
for brown eyesanda 50%chance
of beinghomozygousfor blueeyes;100%chanceof carryingthe hiddentrait for
blue eyes)
PRACTICE:
B
1.) Completethe punnettsquare:
B
6B BB
Bb
tsb
a.)' S}o/ryfuance
of being
vhomozygousfor
'Bt'own
€\i?S
b.) 50%chanceof beingheterczygousfor
(L
tt
'r\___-_,
2.) Complete:
Fa
Vu
ao*
ao-
of being hgkVOq0AO
a.) Sr%chance
forFreeearlobes.
b.) 5A% chanceof being
for attachedearlobes.
3.) Complete:
R
R
(a
I
R\
RI
\\
horr
,r'$tr
str
a.) 25 % chanceof being
for
b.) 5A%chanceof being
for f$|yal
-v
c.) 25% chanceof being
ro, l-€ft
handedness
YtqW|'handedness
that nq llld.) 75o/ochance
" TT
handedness
iandedchildwill beseen.
4.) Complete:
{c MaIe parentis homozygousfor NO CLEFT CHIN.
* Femaleparentis homozygousfor a Cleft Chin.
c.
C
C" C.
C" C.
theoffspring
wiltur tQ\eW{$
u.ll0D x chance
-Cte.t+
chin.
a' S
f"t
/
(t-
5.) Cornplete:
* Male palent is homozygousdominantfor Tallness.
* Fernaleparent is heterozygousfor Tallness.
a
S
"
) l0D
b.)
o/ochance
thattheoffspringwill be T Att
f,o o/ochancethat the offspringwill be
tu .k'il|
hffn
o/ochance
,.) 5000000000000000
thattheoffspring
wiltbe h0+ryU.qg alS
f", '-fcr l,I
d.)
()
o/othatthe offspring will be short.
6.) Pick aftait fi'ompage#l andcomplete:
* Male parentis homozygous/ purebredfor the recessivetrait.
* Femaleparentis hetero4ygous
/ hybrid for the dominanttrait.
D
d
* Write 3 probabilitiesusingthe wordsheterozygous
andhomozygous.
a.)56'r chcunce
o+ bahghUrnoz^tgor)
trr no CkYnc,v.r;
etr dtrnPtlr6c h.v13ho{gv0z{$ctlS
b.)5x'/. CIrfi"ncr-
c)0'/, clnonce-oSberrg h**tgftr\
(f*.
f"( dt rnpuo