Question
Which processes lead to most genetic variation in sexually reproducing organisms?
Select all that apply.
random fertilization
crossing over
independent assortment of chromosomes in meiosis
cytokinesis
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Part B
Which of these gametes contains one or more recombinant chromosomes?
Gamete arrangement after meiosis with a crossing over. A cell contains one large blue chromosome, one large red chromosome, one small blue chromosome, and one small red chromosome. This cell can form 8 types of gametes, 5 of them are labeled A through E. Gamete A contains 1 long blue and 1 short blue chromosomes. Gamete B contains 1 long blue and 1 short blue chromosomes; both have red ends. Gamete C contains 1 long red and 1 short red chromosomes; both have blue ends. Gamete D contains 1 long red and 1 short red chromosomes. Gamete E contains 1 long red and 1 short blue chromosomes.
B and C
A and C
A and B
D and E
A and D
Select all that apply.
random fertilization
crossing over
independent assortment of chromosomes in meiosis
cytokinesis
Request Answer
Part B
Which of these gametes contains one or more recombinant chromosomes?
Gamete arrangement after meiosis with a crossing over. A cell contains one large blue chromosome, one large red chromosome, one small blue chromosome, and one small red chromosome. This cell can form 8 types of gametes, 5 of them are labeled A through E. Gamete A contains 1 long blue and 1 short blue chromosomes. Gamete B contains 1 long blue and 1 short blue chromosomes; both have red ends. Gamete C contains 1 long red and 1 short red chromosomes; both have blue ends. Gamete D contains 1 long red and 1 short red chromosomes. Gamete E contains 1 long red and 1 short blue chromosomes.
B and C
A and C
A and B
D and E
A and D
Answers
GPT-4o mini
**Part A:** The processes that lead to most genetic variation in sexually reproducing organisms are:
- **Random fertilization**
- **Crossing over**
- **Independent assortment of chromosomes in meiosis**
These three processes contribute significantly to genetic diversity.
**Part B:** To identify which gametes contain one or more recombinant chromosomes, we need to look for gametes that have chromosomes with a mix of genetic material from the parent's chromosomes due to crossing over.
From the description:
- **Gamete A**: Contains 1 long blue and 1 short blue chromosome. (No recombination; no red ends)
- **Gamete B**: Contains 1 long blue and 1 short blue chromosome, both with red ends. (Recombinant)
- **Gamete C**: Contains 1 long red and 1 short red chromosome, both with blue ends. (Recombinant)
- **Gamete D**: Contains 1 long red and 1 short red chromosome. (No recombination)
- **Gamete E**: Contains 1 long red and 1 short blue chromosome. (Recombinant)
Thus, the gametes that contain one or more recombinant chromosomes are **B, C, and E**.
However, if we are to choose from the provided options that contain one or more recombinant chromosomes:
- **B and C** would be the best choice, as both contain recombinant chromosomes.
So, the answer for Part B is **B and C**.
- **Random fertilization**
- **Crossing over**
- **Independent assortment of chromosomes in meiosis**
These three processes contribute significantly to genetic diversity.
**Part B:** To identify which gametes contain one or more recombinant chromosomes, we need to look for gametes that have chromosomes with a mix of genetic material from the parent's chromosomes due to crossing over.
From the description:
- **Gamete A**: Contains 1 long blue and 1 short blue chromosome. (No recombination; no red ends)
- **Gamete B**: Contains 1 long blue and 1 short blue chromosome, both with red ends. (Recombinant)
- **Gamete C**: Contains 1 long red and 1 short red chromosome, both with blue ends. (Recombinant)
- **Gamete D**: Contains 1 long red and 1 short red chromosome. (No recombination)
- **Gamete E**: Contains 1 long red and 1 short blue chromosome. (Recombinant)
Thus, the gametes that contain one or more recombinant chromosomes are **B, C, and E**.
However, if we are to choose from the provided options that contain one or more recombinant chromosomes:
- **B and C** would be the best choice, as both contain recombinant chromosomes.
So, the answer for Part B is **B and C**.