If an individual of blood type M and one of blood type MN have children, the number of different phenotypes possible in their offspring is
A - VCE - SSCE Biology - Question 13 - 2004 - Paper 1
Question 13
If an individual of blood type M and one of blood type MN have children, the number of different phenotypes possible in their offspring is
A. 1
B. 2
C. 3
D. 4
Worked Solution & Example Answer:If an individual of blood type M and one of blood type MN have children, the number of different phenotypes possible in their offspring is
A - VCE - SSCE Biology - Question 13 - 2004 - Paper 1
Step 1
Identify the Parent Blood Types
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Answer
The individuals have phenotypes M (genotype MM) and MN. The corresponding genotypes are:
Parent 1: M
Parent 2: MN
Step 2
List Possible Gametes
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Answer
From these genotypes, the possible gametes are:
Parent 1 (M): can only produce M gametes.
Parent 2 (MN): can produce both M and N gametes.
Step 3
Determine Offspring Genotypes
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Answer
Combining the gametes from both parents gives:
M (from Parent 1) + M (from Parent 2) = MM (Blood type M)
M (from Parent 1) + N (from Parent 2) = MN (Blood type MN)
Thus, the possible genotypes of the offspring are MM and MN.
Step 4
Calculating Different Phenotypes
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Answer
The possible phenotypes for the offspring are:
Blood type M (MM)
Blood type MN (MN)
Therefore, there are 2 different phenotypes.
