ETEA PAST PAPER 2020 ( PART 17 ) 1. Phenotype is The genetic complement ie the genes in an individual for a particular trait Partner of gene pair The position of a gene on the chromosome The form of appearance of a trait 2. In complete dominance Gene mutation may produce many different alleles of a gene Different alleles of a gene are both expressed in heterozygous condition The phenotype of the heterozygote is intermediate between phenotypes of the homozygotes One alleles (R) is completely dominant over the other (r) and the presence of recessive allele is functionally hidden the heterozygote (Rr) has the same sound phenotype (RR) heterozygote 3. Which one of the following is found in both messenger RNA and DNA of a mammalian cell? Double helical structure Thymine Ribose sugar Sugar- phosphate backbone 4. The cells in our body are all genetically identical apart from the White blood cells Muscle fibers Somatic cells Reproductive cells 5. Transcription is the process in which an RNA copy of the DNA sequence and coding the gene is produced with help of an enzyme called: DNA polymerases RNA transcriptase DNA transcriptase RNA polymerase 6. The particular array of chromosomes that an individual process is called its Allele Karyotype Genotype Phenotype 7. During meiosis, the homologous chromosomes comes together and form pairs this process is called Crossing over Pairing Linkage Synapsis 8. At what phase the DNA content of a cell is doubled? Telophase Anaphase Interphase Prophase 9. Which statement correctly describes transcription of DNA? It produces amino acids It produces messenger RNA It results in increased DNA synthesis It is a semi conservative process 10. “law of independent assortment” states The each pair of alleles assort independently of other pairs of alleles during gamete formation That allele for each pair of contrasting trait have unequal probability to assort with the alleles of other pairs That pertain to inheritance of single trait (monohybrid cross) That that coexisting alleles for each trait segregate (separate) from each other at meiosis so that each gamete receives only one of the two alleles Loading … Pages: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
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