For each of the following crosses, what is the probability that a given child wi
ID: 186495 • Letter: F
Question
For each of the following crosses, what is the probability that a given child will have the exact same phenotype as either or both of the two parents? How many phenotypically different kinds of progeny could potentially result from each cross? How many genotypically different kinds of progeny could potentially result from each cross? You can assume capital letters represent dominant alleles and that the loci assort independently.
a) Aa Bb cc dd × aa bb Cc Dd
b) AA BB CC DD × aa bb cc dd
c) Aa Bb Cc Dd × Aa Bb Cc Dd
Explanation / Answer
a) Aa Bb cc dd × aa bb Cc Dd
abCD
abcD
abCd
abcd
ABcd
AaBbCcDd
AaBbccDd
AaBbCcdd
AaBbccdd
Abcd
AabbCcdd
AabbccDd
AabbCcdd
Aabbccdd
aBcd
aaBbCcDd
aaBbccDd
aaBbCcdd
aaBbccdd
abcd
aabbCcDd
aabbccDd
aabbCcdd
aabbccdd
Parental type progeny = 2/16 = 1/8
phenotypically different kinds of progeny could potentially result from cross = phenotypically and genotypically all the progenies will be 16 different progenies.
b) AA BB CC DD × aa bb cc dd
c) Aa Bb Cc Dd × Aa Bb Cc Dd
abcd
ABCD
AaBbCcDd
F1 = AaBbCcDd X AaBbCcDd
ABCD
AbCD
ABcD
AbcD
Abcd
aBCD
abCD
aBcD
abcD
abcd
ABCD
AABBCCDD
AABbCCDD
AABBCcDD
AABbCcDD
AABbCcDd
AaBBCCDD
AaBbCCDD
AaBBCcDD
AaBbCcDD
AaBbCcDd
AbCD
AABbCCDD
AAbbCCDD
AABbCcDD
AAbbCcDD
AAbbCcDd
AaBbCCDD
AabbCCDD
AaBbCcDD
AabbCcDD
AabbCcDd
ABcD
AABBCcDD
AABbCcDD
AABBccDD
AABbccDD
AABbccDD
AaBBCcDD
AaBbCcDD
AaBBCcDD
AaBbccDD
AaBbccDD
AbcD
AABbCcDD
AAbbCcDD
AABbccDD
AAbbccDD
AAbbccDD
AABbCcDD
AabbccDD
AaBbccDD
AabbccDD
AabbccDd
Abcd
AABbCcDd
AAbbCcDd
AABbccDd
AABbccDd
AAbbccdd
AaBbCcDd
Aabbccdd
AaBbccDd
AabbccDd
Aabbccdd
aBCD
AaBBCCDD
AaBbCCDD
AaBBCcDD
AaBbCcDD
AaBBCcDd
aaBBCCDD
aaBbCCDD
aaBBCcDD
aaBbCcDD
aaBbCcDd
abCD
AaBbCCDD
AabbCCDD
AaBbCcDD
AabbCcDD
AabbCcDd
aaBbCCDD
aabbCCDD
aaBbCcDD
aabbCcDD
aabbCcDd
aBcD
AaBBCcDD
AaBbCcDD
AaBbccDD
AaBbccDD
AaBbccDd
aaBBCcDD
aaBbCcDD
aaBBccDD
aaBbccDD
aaBbccDd
abcd
AaBbCcDd
AaBbCcDd
AaBbccDd
AabbccDd
Aabbccdd
aaBbCcDd
aabbCcDd
aaBbccDd
aabbccDd
aabbccdd
B. Parental type progeny = 2/81
Phenotypically trhere will be 9 types of progenies.
and genotypically 18 types of progenies
C. . Parental type progeny = 4/81
Same as in part B.
abCD
abcD
abCd
abcd
ABcd
AaBbCcDd
AaBbccDd
AaBbCcdd
AaBbccdd
Abcd
AabbCcdd
AabbccDd
AabbCcdd
Aabbccdd
aBcd
aaBbCcDd
aaBbccDd
aaBbCcdd
aaBbccdd
abcd
aabbCcDd
aabbccDd
aabbCcdd
aabbccdd
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