With reference to self-incompatibility, consider the following statements
1. Sporophytic system of self-incompatibility is governed by a single gene with multiple alleles.
2. The incompatibility reaction of pollen is governed by the genotype of the plant on which pollen is produced.
3. The 's' alleles are responsible for sporophytic incompatibility
4. Failure of pollen germination on stigma, slow pollen tube growth after pollination are some of the reasons for this self-incompatibility.
Which of the statements given above are correct?
A. 1, 2 and 3
B. 2, 3 and 4
C. 1 and 4
D. All of the above
Answer: Option D
Solution(By Examveda Team)
Concerning self-incompatibility, all four statements are correct.Self-incompatibility is a widespread mechanism in flowering plants that prevents inbreeding and promotes outcrossing.
The sporophytic system of self-incompatibility is governed by a single gene with multiple alleles. The incompatibility reaction of pollen is governed by the genotype of the plant on which pollen is produced.
The 's' alleles are responsible for sporophytic incompatibility.
Failure of pollen germination on stigma, and slow pollen tube growth after pollination are some of the reasons for this self-incompatibility.
Related Questions on Genetics and Plant Breeding
Genetic code was discovered by
A. Khorana and Methaei
B. Flemming and Methaei
C. Holley, Nirenberg and Khorana
D. Holley and Nirenberg
Progeny of breeder seed is referred to as
A. Breeder seed
B. Nucleus seed
C. Foundation seed
D. Certified seed
Molecular basis of organ differentiation depends on the modulation in transcription by
A. RNA pol
B. Transcription factor
C. Anticodon
D. All of the above
The phenomenon of linkage was first observed by
A. Bateson and Punnet
B. Nilson
C. Hugo de Vries
D. Mendel
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