ETEA PAST PAPER 2020 ( PART 17 ) 1. Phenotype is The form of appearance of a trait 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 2. In complete dominance The phenotype of the heterozygote is intermediate between phenotypes of the homozygotes Different alleles of a gene are both expressed in heterozygous condition 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 Gene mutation may produce many different alleles of a gene 3. Which one of the following is found in both messenger RNA and DNA of a mammalian cell? Ribose sugar Sugar- phosphate backbone Thymine Double helical structure 4. The cells in our body are all genetically identical apart from the Muscle fibers Somatic cells White blood 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: RNA polymerase DNA transcriptase RNA transcriptase DNA polymerases 6. The particular array of chromosomes that an individual process is called its Allele Phenotype Genotype Karyotype 7. During meiosis, the homologous chromosomes comes together and form pairs this process is called Linkage Synapsis Crossing over Pairing 8. At what phase the DNA content of a cell is doubled? Prophase Interphase Anaphase Telophase 9. Which statement correctly describes transcription of DNA? It results in increased DNA synthesis It produces amino acids It is a semi conservative process It produces messenger RNA 10. “law of independent assortment” states That allele for each pair of contrasting trait have unequal probability to assort with the alleles of other pairs 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 The each pair of alleles assort independently of other pairs of alleles during gamete formation That pertain to inheritance of single trait (monohybrid cross) 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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