ACTIVITY: BLOOD TYPES, MULTIPLE ALLELES, CO-DOMINANCE & INCOMPLETE DOMINANCE

PART A – Genes and Blood Types

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1. Complete the following table by writing the blood type Genotype AND Phenotype in the gaps below:

2. Blood typing is sometimes used in custody cases in court. Two men both claim to be the father of the child. The child has Type A blood and the mother type B blood. Man 1 has type O blood, while man 2 has type AB blood.

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2. a) Which man is definitely not the father of the child? Show workings to explain (see below)

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2. a) workings

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2. b) Does this test prove that the other man is the father? Explain

3. A man has type A blood. He and his wife have three children, whose blood types are A, o and B

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3. a) Determine the GENOTYPES of the parents and the children

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3. b) What is the BLOOD TYPE of the children’s mother?

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3. c) Is it possible that the next child could have type AB blood? Show working below

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3. c) workings

4. A woman with type O blood has a child with type O blood. She is fairly certain that the father is the second of her two husbands.

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4. a) His blood type is A, is it possible that he is the father? Why?

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4. b) If a husband #2's mother has type A blood and his father type AB. is it possible that he is the father? Show workings below

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4. b) workings

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4. c) If both of his parents have types AB, could he be the father? Show workings below

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4. c) workings

PART B – Incomplete Dominance

After several matings of tan-coloured birds, a breeder noted the following average offspring numbers:

24 white, 26 brown and 53 tan birds.

There are only two genes that control feather colour in birds – they are WW- White and  BB - Brown with the intermediate or mixed colour being  BW - Tan

1) Work out a cross that would produce the following results:
50% of all offspring are brown

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1) workings

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1) Parent Phenotypes - a)_ x b)_

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1) Parent Genotypes - c) x d)___

2) Work out a cross that would produce the following results:
100% of all offspring are tan

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2) workings

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2) Parent Phenotypes - a)_ x b)_

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2) Parent Genotypes - c) x d)___

3) Work out a cross that would produce the following results:
50% of all offspring are tan

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3) workings

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3) Parent Phenotypes - a)_ x b)_

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3) Parent Genotypes - c) x d)___

4) Work out a cross that would produce the following results:
25% of all offspring are white

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4) workings

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4) Parent Phenotypes - a)_ x b)_

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4) Parent Genotypes - c) x d)___

PART C – Codominance

1) In the short-horn cattle breed coat colour is inherited and there are only two alleles (CW – White, CR – Red). 

Roan cattle contain both red hair and white hair – giving their coat a mottled ‘roan’ appearance.

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1) Complete the following two crosses:

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ACTIVITY: BLOOD TYPES, MULTIPLE ALLELES, CO-DOMINANCE & INCOMPLETE DOMINANCE

1. Complete the following table by writing the blood type Genotype AND Phenotype in the gaps below:

2. a) Which man is definitely not the father of the child? Show workings to explain (see below)

2. a) workings

2. b) Does this test prove that the other man is the father? Explain

3. a) Determine the GENOTYPES of the parents and the children

3. b) What is the BLOOD TYPE of the children’s mother?

3. c) Is it possible that the next child could have type AB blood? Show working below

3. c) workings

4. a) His blood type is A, is it possible that he is the father? Why?

4. b) If a husband #2's mother has type A blood and his father type AB. is it possible that he is the father? Show workings below

4. b) workings

4. c) If both of his parents have types AB, could he be the father? Show workings below

4. c) workings

1) workings

1) Parent Phenotypes - a)___________________ x b)___________________

1) Parent Genotypes - c)__________________ x d)_____________________

2) workings

2) Parent Phenotypes - a)___________________ x b)___________________

2) Parent Genotypes - c)__________________ x d)_____________________

3) workings

3) Parent Phenotypes - a)___________________ x b)___________________

3) Parent Genotypes - c)__________________ x d)_____________________

4) workings

4) Parent Phenotypes - a)___________________ x b)___________________

4) Parent Genotypes - c)__________________ x d)_____________________

1) Complete the following two crosses:

2) Suggest how the farmer who owns these cattle could control the breeding so that the herd ultimately consisted of red cattle only

1. Complete the following table by writing the blood type Genotype AND Phenotype in the gaps below:

2. a) Which man is definitely not the father of the child? Show workings to explain (see below)

2. a) workings

2. b) Does this test prove that the other man is the father? Explain

3. a) Determine the GENOTYPES of the parents and the children

3. b) What is the BLOOD TYPE of the children’s mother?

3. c) Is it possible that the next child could have type AB blood? Show working below

3. c) workings

4. a) His blood type is A, is it possible that he is the father? Why?

4. b) If a husband #2's mother has type A blood and his father type AB. is it possible that he is the father? Show workings below

4. b) workings

4. c) If both of his parents have types AB, could he be the father? Show workings below

4. c) workings

1) workings

1) Parent Phenotypes - a)___________________ x b)___________________

1) Parent Genotypes - c)__________________ x d)_____________________

2) workings

2) Parent Phenotypes - a)___________________ x b)___________________

2) Parent Genotypes - c)__________________ x d)_____________________

3) workings

3) Parent Phenotypes - a)___________________ x b)___________________

3) Parent Genotypes - c)__________________ x d)_____________________

4) workings

4) Parent Phenotypes - a)___________________ x b)___________________

4) Parent Genotypes - c)__________________ x d)_____________________

1) Complete the following two crosses:

2) Suggest how the farmer who owns these cattle could control the breeding so that the herd ultimately consisted of red cattle only

1) Parent Phenotypes - a)_ x b)_

1) Parent Genotypes - c) x d)___

2) Parent Phenotypes - a)_ x b)_

2) Parent Genotypes - c) x d)___

3) Parent Phenotypes - a)_ x b)_

3) Parent Genotypes - c) x d)___

4) Parent Phenotypes - a)_ x b)_

4) Parent Genotypes - c) x d)___

1) Parent Phenotypes - a)_ x b)_

1) Parent Genotypes - c) x d)___

2) Parent Phenotypes - a)_ x b)_

2) Parent Genotypes - c) x d)___

3) Parent Phenotypes - a)_ x b)_

3) Parent Genotypes - c) x d)___

4) Parent Phenotypes - a)_ x b)_

4) Parent Genotypes - c) x d)___