Question
Codominance:
Shorthorn cattle: Roan cattle are a mix between red and white cattle. Roan cattle have both red and white fur because they are heterozygous for fur color and both alleles are expressed. This is another example of codominance. White cattle is homozygous for the W allele. Red cattle is homozygous for the R allele.
1. What are the genotypes for the cows below?
Red Cattle: ________ White Cattle: ________ Roan Cattle: ________ or ________
Bull: Male Cow: Female
2. What offspring are expected from mating a roan bull and a roan cow?
a. What would the genotypes of the two parents be? _________ x _________
b. What is the probability that they will have a red offspring? _______%
c. What is the probability that they will have a white offspring? _______%
d. What is the probability that they will have roan offspring? _______%
3. What phenotypes would you expect from a cross between a red bull and a white cow?
a. What would the genotypes of the two parents be? _________ x _________
b. What is the probability that they will have a red offspring? _______%
c. What is the probability that they will have a white offspring? _______%
d. What is the probability that they will have roan offspring? _______%
4. What phenotypes would you expect from a cross between a red bull and a roan cow?
a. What would the genotypes of the two parents be? _________ x _________
b. What is the probability that they will have a red offspring? _______%
c. What is the probability that they will have a white offspring? _______%
d. What is the probability that they will have roan offspring? _______%
Incomplete:
In Andalusian fowls, there are three phenotypes of feather color. Black, white, and a bluish-grey fowl. The black allele is CB while the white allele is CW. Black and white fowls are homozygous while. Bluish-gray fowls are heterozygous.
5. What are the genotype(s) for the birds below?
Black bird: ________ White bird: ________ Bluish-Gray bird: ________ or ________
6. A homozygous black bird is crossed with a homozygous white bird. Cross birds and calculate the chance of having each offspring. Complete the Punnett square.
a. Parent Genotypes: _________ x _________
b. Percent offspring that are Black Birds: _____ %
c. Percent offspring that are White Birds: _____ %
d. Percent offspring that are Bluish-gray Birds: _____ %
7. What results if a black bird is crossed with a bluish-gray bird? Complete the Punnett square.
a. Parent Genotypes: _________ x _________
b. Percent offspring that are Black Birds: _____ %
c. Percent offspring that are White Birds: _____ %
d. Percent offspring that are Bluish-gray Birds: _____ %
8. If two Black fowls that are CBCB birds were crossed, what would be the ratios for both phenotype and genotype of the offspring? Complete a Punnett square.
a. Parent Genotypes: _________ x _________
b. Percent offspring that are Black Birds: _____ %
c. Percent offspring that are White Birds: _____ %
d. Percent offspring that are Bluish-gray Birds: _____ %
Shorthorn cattle: Roan cattle are a mix between red and white cattle. Roan cattle have both red and white fur because they are heterozygous for fur color and both alleles are expressed. This is another example of codominance. White cattle is homozygous for the W allele. Red cattle is homozygous for the R allele.
1. What are the genotypes for the cows below?
Red Cattle: ________ White Cattle: ________ Roan Cattle: ________ or ________
Bull: Male Cow: Female
2. What offspring are expected from mating a roan bull and a roan cow?
a. What would the genotypes of the two parents be? _________ x _________
b. What is the probability that they will have a red offspring? _______%
c. What is the probability that they will have a white offspring? _______%
d. What is the probability that they will have roan offspring? _______%
3. What phenotypes would you expect from a cross between a red bull and a white cow?
a. What would the genotypes of the two parents be? _________ x _________
b. What is the probability that they will have a red offspring? _______%
c. What is the probability that they will have a white offspring? _______%
d. What is the probability that they will have roan offspring? _______%
4. What phenotypes would you expect from a cross between a red bull and a roan cow?
a. What would the genotypes of the two parents be? _________ x _________
b. What is the probability that they will have a red offspring? _______%
c. What is the probability that they will have a white offspring? _______%
d. What is the probability that they will have roan offspring? _______%
Incomplete:
In Andalusian fowls, there are three phenotypes of feather color. Black, white, and a bluish-grey fowl. The black allele is CB while the white allele is CW. Black and white fowls are homozygous while. Bluish-gray fowls are heterozygous.
5. What are the genotype(s) for the birds below?
Black bird: ________ White bird: ________ Bluish-Gray bird: ________ or ________
6. A homozygous black bird is crossed with a homozygous white bird. Cross birds and calculate the chance of having each offspring. Complete the Punnett square.
a. Parent Genotypes: _________ x _________
b. Percent offspring that are Black Birds: _____ %
c. Percent offspring that are White Birds: _____ %
d. Percent offspring that are Bluish-gray Birds: _____ %
7. What results if a black bird is crossed with a bluish-gray bird? Complete the Punnett square.
a. Parent Genotypes: _________ x _________
b. Percent offspring that are Black Birds: _____ %
c. Percent offspring that are White Birds: _____ %
d. Percent offspring that are Bluish-gray Birds: _____ %
8. If two Black fowls that are CBCB birds were crossed, what would be the ratios for both phenotype and genotype of the offspring? Complete a Punnett square.
a. Parent Genotypes: _________ x _________
b. Percent offspring that are Black Birds: _____ %
c. Percent offspring that are White Birds: _____ %
d. Percent offspring that are Bluish-gray Birds: _____ %
Answers
GPT-4o mini
Let's break down your questions about codominance and incomplete dominance!
### Codominance:
1. **Genotypes for the cows**:
- Red Cattle: **RR**
- White Cattle: **WW**
- Roan Cattle: **RW**
2. **Offspring from mating a roan bull and a roan cow**:
a. **Genotypes of the two parents**: **RW x RW**
b. **Probability of having a red offspring**:
- Possible genotypes: RR, RW, RW, WW
- Probability of red (RR): **25%**
c. **Probability of having a white offspring**:
- Probability of white (WW): **25%**
d. **Probability of having roan offspring**:
- Probability of roan (RW): **50%**
3. **Phenotypes from a cross between a red bull and a white cow**:
a. **Genotypes of the two parents**: **RR x WW**
b. **Probability of having a red offspring**:
- All offspring will be RW (roan). Probability of red (RR): **0%**
c. **Probability of having a white offspring**:
- All offspring will be RW (roan). Probability of white (WW): **0%**
d. **Probability of having roan offspring**:
- All offspring will be RW. Probability of roan (RW): **100%**
4. **Phenotypes from a cross between a red bull and a roan cow**:
a. **Genotypes of the two parents**: **RR x RW**
b. **Probability of having a red offspring**:
- Possible genotypes: RR, RW
- Probability of red (RR): **50%**
c. **Probability of having a white offspring**:
- Probability of white (WW): **0%**
d. **Probability of having roan offspring**:
- Probability of roan (RW): **50%**
### Incomplete Dominance:
5. **Genotype(s) for the birds**:
- Black bird: **CB CB**
- White bird: **CW CW**
- Bluish-Gray bird: **CB CW**
6. **Cross of a homozygous black bird with a homozygous white bird**:
a. **Parent Genotypes**: **CB CB x CW CW**
b. **Percent offspring that are Black Birds**: **0%**
c. **Percent offspring that are White Birds**: **0%**
d. **Percent offspring that are Bluish-gray Birds**: **100%**
7. **Cross of a black bird with a bluish-gray bird**:
a. **Parent Genotypes**: **CB CB x CB CW**
b. **Percent offspring that are Black Birds**:
- Possible genotypes: CB CB (Black), CB CW (Bluish-gray)
- Probability of black: **50%**
c. **Percent offspring that are White Birds**: **0%**
d. **Percent offspring that are Bluish-gray Birds**:
- Probability of bluish-gray: **50%**
8. **Cross of two Black fowls (CBCB)**:
a. **Parent Genotypes**: **CB CB x CB CB**
b. **Percent offspring that are Black Birds**:
- All offspring will be CB CB (Black). Probability of black: **100%**
c. **Percent offspring that are White Birds**: **0%**
d. **Percent offspring that are Bluish-gray Birds**: **0%**
I hope this answers all your questions about codominance and incomplete dominance! Let me know if you need any further clarification.
### Codominance:
1. **Genotypes for the cows**:
- Red Cattle: **RR**
- White Cattle: **WW**
- Roan Cattle: **RW**
2. **Offspring from mating a roan bull and a roan cow**:
a. **Genotypes of the two parents**: **RW x RW**
b. **Probability of having a red offspring**:
- Possible genotypes: RR, RW, RW, WW
- Probability of red (RR): **25%**
c. **Probability of having a white offspring**:
- Probability of white (WW): **25%**
d. **Probability of having roan offspring**:
- Probability of roan (RW): **50%**
3. **Phenotypes from a cross between a red bull and a white cow**:
a. **Genotypes of the two parents**: **RR x WW**
b. **Probability of having a red offspring**:
- All offspring will be RW (roan). Probability of red (RR): **0%**
c. **Probability of having a white offspring**:
- All offspring will be RW (roan). Probability of white (WW): **0%**
d. **Probability of having roan offspring**:
- All offspring will be RW. Probability of roan (RW): **100%**
4. **Phenotypes from a cross between a red bull and a roan cow**:
a. **Genotypes of the two parents**: **RR x RW**
b. **Probability of having a red offspring**:
- Possible genotypes: RR, RW
- Probability of red (RR): **50%**
c. **Probability of having a white offspring**:
- Probability of white (WW): **0%**
d. **Probability of having roan offspring**:
- Probability of roan (RW): **50%**
### Incomplete Dominance:
5. **Genotype(s) for the birds**:
- Black bird: **CB CB**
- White bird: **CW CW**
- Bluish-Gray bird: **CB CW**
6. **Cross of a homozygous black bird with a homozygous white bird**:
a. **Parent Genotypes**: **CB CB x CW CW**
b. **Percent offspring that are Black Birds**: **0%**
c. **Percent offspring that are White Birds**: **0%**
d. **Percent offspring that are Bluish-gray Birds**: **100%**
7. **Cross of a black bird with a bluish-gray bird**:
a. **Parent Genotypes**: **CB CB x CB CW**
b. **Percent offspring that are Black Birds**:
- Possible genotypes: CB CB (Black), CB CW (Bluish-gray)
- Probability of black: **50%**
c. **Percent offspring that are White Birds**: **0%**
d. **Percent offspring that are Bluish-gray Birds**:
- Probability of bluish-gray: **50%**
8. **Cross of two Black fowls (CBCB)**:
a. **Parent Genotypes**: **CB CB x CB CB**
b. **Percent offspring that are Black Birds**:
- All offspring will be CB CB (Black). Probability of black: **100%**
c. **Percent offspring that are White Birds**: **0%**
d. **Percent offspring that are Bluish-gray Birds**: **0%**
I hope this answers all your questions about codominance and incomplete dominance! Let me know if you need any further clarification.