An individual heterozygous for a reciprocal translocation has the following chromosomes. Which chromosomes do the gametes receive after adjacent-1 segregation? 
A B • C D E F G                J K • L M N O P 
A B • C D N O P               J K • L M E F G 

• A. A B • C D E F G and J K • L M E F G
• B. A B • C D N O P and J K • L M E F G
• C. A B • C D N O P and A B • C D E F G

Answer: (A)

Verified step by step guidance

1. Understand the concept of reciprocal translocation, which involves the exchange of segments between two non-homologous chromosomes.
2. Recognize that in a heterozygous individual for a reciprocal translocation, chromosomes can segregate in different ways during meiosis, leading to different combinations in gametes.
3. Identify that adjacent-1 segregation results in each gamete receiving one normal and one translocated chromosome, but from different homologous pairs.
4. Analyze the given chromosome pairs: A B • C D E F G with J K • L M N O P and A B • C D N O P with J K • L M E F G.
5. Determine the combinations of chromosomes that result from adjacent-1 segregation, ensuring each gamete receives one chromosome from each pair, leading to the specified combinations.