You have a black ram and you are trying to determine what its genotype is. You know that all white ewes have a recessive genotype of bb. You know that black coat color may be heterozygous or homozygous dominant. You breed the ram to 8 white ewes. They each produce two lambs. All of the lambs are black. What is the probable genotype of the ram? Homozygous dominant, BB Heterozygous, Bb Homozygous recessive, bb You are not given enough information to make an educated guess None of the above

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**Determining the Genotype of a Black Ram**

In genetics, the coat color of animals can often be used to determine their genotype. In this scenario, you have a black ram, and you want to figure out its genotype based on its offspring with white ewes. Here's a step-by-step approach to understand the probable genotype of the ram.

**Given Information:**
1. All white ewes have a recessive genotype of bb.
2. The black coat color in rams can be either heterozygous (Bb) or homozygous dominant (BB).
3. The ram is bred with 8 white ewes, each producing two lambs, for a total of 16 lambs.
4. All 16 lambs have black coats.

**Question:** What is the probable genotype of the ram?

**Options:**
1. **Homozygous dominant, BB**
2. **Heterozygous, Bb**
3. **Homozygous recessive, bb**
4. **You are not given enough information to make an educated guess**
5. **None of the above**

**Understanding the Genetics:**

* **BB genotype** - If the ram is homozygous dominant, all of its offspring will have at least one dominant B gene. When crossed with a bb ewe, all offspring will be Bb, expressing the black phenotype.
  
* **Bb genotype** - If the ram is heterozygous, it has a 50% chance of passing on the B allele and a 50% chance of passing on the b allele. Crossing a Bb ram with a bb ewe would yield a 50% black (Bb) and 50% white (bb) offspring on average.

* **bb genotype** - This is not possible for the black ram since a bb genotype ram would be white.

**Analysis:**
Given that all 16 lambs are black, it is most probable that the black ram is homozygous dominant (BB). If it were heterozygous (Bb), statistically, approximately half of the offspring would be expected to be white (bb), which is not observed here.

**Conclusion:**
The probable genotype of the ram is **homozygous dominant, BB**.

**Answer:**
- **Homozygous dominant, BB**
Transcribed Image Text:**Determining the Genotype of a Black Ram** In genetics, the coat color of animals can often be used to determine their genotype. In this scenario, you have a black ram, and you want to figure out its genotype based on its offspring with white ewes. Here's a step-by-step approach to understand the probable genotype of the ram. **Given Information:** 1. All white ewes have a recessive genotype of bb. 2. The black coat color in rams can be either heterozygous (Bb) or homozygous dominant (BB). 3. The ram is bred with 8 white ewes, each producing two lambs, for a total of 16 lambs. 4. All 16 lambs have black coats. **Question:** What is the probable genotype of the ram? **Options:** 1. **Homozygous dominant, BB** 2. **Heterozygous, Bb** 3. **Homozygous recessive, bb** 4. **You are not given enough information to make an educated guess** 5. **None of the above** **Understanding the Genetics:** * **BB genotype** - If the ram is homozygous dominant, all of its offspring will have at least one dominant B gene. When crossed with a bb ewe, all offspring will be Bb, expressing the black phenotype. * **Bb genotype** - If the ram is heterozygous, it has a 50% chance of passing on the B allele and a 50% chance of passing on the b allele. Crossing a Bb ram with a bb ewe would yield a 50% black (Bb) and 50% white (bb) offspring on average. * **bb genotype** - This is not possible for the black ram since a bb genotype ram would be white. **Analysis:** Given that all 16 lambs are black, it is most probable that the black ram is homozygous dominant (BB). If it were heterozygous (Bb), statistically, approximately half of the offspring would be expected to be white (bb), which is not observed here. **Conclusion:** The probable genotype of the ram is **homozygous dominant, BB**. **Answer:** - **Homozygous dominant, BB**
**Question: Which of the following is NOT an example of a quantitative trait?**

1. Tail length
2. Eye color
3. Height
4. Weight
5. All of the above are examples.

*Note: There are no graphs or diagrams associated with this question.*
Transcribed Image Text:**Question: Which of the following is NOT an example of a quantitative trait?** 1. Tail length 2. Eye color 3. Height 4. Weight 5. All of the above are examples. *Note: There are no graphs or diagrams associated with this question.*
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