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30 January, 15:46

2. Dominant trait: cleft chin (C) Mother's gametes: Cc

Recessive trait: lacks cleft chin (c) Father's gametes: cc

Offspring Genotypes:

Offspring Phenotypes:

% chance child will have cleft chin:

3. Dominant trait: flat feet (A) Mother's gametes: Heterozygous

Recessive trait: arched feet (a) Father's gametes: Heterozygous

% chance child will have arched feet:

4. Dominant trait: Brown hair (B) Mother's gametes: Homozygous recessive

Recessive trait: Blonde hair (b) Father's gametes: Heterozygous

% chance child will have blonde hair:

5. Dominant trait: farsightedness (F) Mother's gametes: Heterozygous

Recessive trait: normal vision (f) Father's gametes: Heterozygous

% chance child will have normal vision:

+2
Answers (1)
  1. 30 January, 16:06
    0
    Answer No 2:

    c c

    C Cc Cc

    c cc cc

    The genotype of the offsprings would be Cc, Cc, cc, cc i. e heterozygous cleft chin and no cleft chin. The phenotype of the offsprings could be 50% cleft chin and 50% without cleft chin.

    there will be 50% chance of the child to have cleft chin.

    Answer No 3:

    A a

    A Aa Aa

    a Aa aa

    There will be 25% chance for the offspring to have arched feet. As arched feet is a recessive trait, so for this trait to occur both the alleles of the gene should be recessive i. e aa.

    Answer No 4:

    B b

    b Bb bb

    b Bb bb

    As blonde is a recessive trait, so both the alleles for this gene should be recessive for this trait to occur. Hence, according to the punnet square, there will be 50% chance for the offspring to be blonde.

    Answer No 5:

    F f

    F FF Ff

    f Ff ff

    As normal vision is a resessive trait, hence both the alleles of the gene should be recessive for the trait to occur. According to the punnet square, there is 25% chance that the child will have normal vision.
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