Tag: CSIR NET Life Science Previous Year Questions and Solution Genetics

A mutant mating type mt strain of Chlamydomonas that was resistant to the antibiotic kanamycin (kanr) and herbicide PPT (pptr) was crossed to a wild type mating mt+ kams ppts […]

During development, many gene products are provided by the females to the eggs which are needed for normal development of the zygote. Such genes are called as maternal-effect genes. The […]

12. In Drosophila, a cross was set between a male homozygous for alleles S+/S+ (phenotype A) and a female homozygous of S/S (phenotype B) (‘S+‘ being a dominant allele and […]

11. A male snail homozygous for dextral alleles is crossed with a female homozygous for sinistral alleles. All the F1 individuals showed sinistral phenotype. When F1 progeny snails were self-fertilized […]

10. Maternal inheritance of coiling of shell in snail (limnaea peregra) is well established. The dextral coiling depends on dominant allele D and sinistral coiling depends upon recessive allele d. […]

9. In Neurospora, the mutant stp exhibits erratic stop-and-start growth.  When a female of stp strain is crossed with a normal strain acting as a male, all progeny individuals showed […]

8. In Neurospora, the mutant stp exhibits erratic stop-start growth. The mutant site is known to be in the mitochondrial DNA. If an stp strain is used as the female […]

7. The characteristic of mitochondrial genome is? (1) Intron free DNA (2) Repetitive DNA (3) Polycistronic transcription (4) Satellite DNA Introduction: The mitochondrial genome is a distinct genetic system found […]

A poky Neurospora was crossed with normal Neurospora and following results were obtained ♀ Poky X ♂ Normal à all poky ♀Normal X ♂ Poky à all Normal The mode […]

5. Yeast with petite colony when crossed with wild type generates no petite colony. The most probable mode of inheritance is (1) Chloroplast      (2) Mitochondria (3) Episomal         (4) Nuclear Introduction: […]