24. At the end of mitosis, how many haploid cells are there? (A) 0 (B) 2 (C)4 (D

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24. At the end of mitosis, how many haploid cells are there? (A) 0 (B) 2 (C)4 (D) 8 25. At the end of meiosis II, how many haploid cells are there? (A) 0 (B) 2 (C) 4 (D) 8 The cross TtPpxTtPo is a (A) monohybrid cross. (B) dihybrid cross. (C) homozygous cross.(D) tetrahybrid cross. The diploid number of chromosomes in humans is (A) 23. (B) 46. (C) 47. (D) 48 26, -- 27. 28. A micrograph that contains pairs of homologous chromosomes arranged in decreasing size is called a (A) karyotype. (B) linkage map. (C) pedigree. (D) metaphase plate. 29. A cross between two plants produces 100 offspring. Of the offspring, 75 have flat leaves and 25 have curled leaves. What is the ratio of flat leaves to curled leaves? (A) 75:25 (B) 75 in 100, or 3 in 4 (C) 25:75 (D) 25 in 100, or 1 in 4 30. Using the information from question 29 above, what is the probability that any given offspring will have flat leaves? (A) 25 in 100, or 1 in4 (B) 75 in 100, or 3 in4 (C) 75:25 (D) 25:75 31.The plants crossed in questions 29 and 30 are most likely both (A) heterozygous. (B) homozygous recessive. (C) homozygous dominant. 32.A person with an XO sex chromosome combination is a (A) normal male. (C) normal female. (B) male with Klinefelter's syndrome. (D) female with Turner's syndrome. 33. What substance picks up amino acids and carries them to the ribosomes? (A) DNA (B) tRNA (C) rRNA (D) mRNA 34. What substance carries information from the nucleus to the cytoplasm? (A) DNA (B) tRNA (C) rRNA (D) mRNA

Explanation / Answer

Ans 24: ( B ) 2

Ans 25: ( C ) 4

Ans 26: ( B ) dihybrid cross

Ans 27: ( B ) 46

Ans 28: ( A ) karyotype

Ans 29: ( B ) 75 in 100 or 3 in 4

Ans 30: ( B ) 75 in 100 or 3 in 4

Ans 31: ( A ) heterozygous

Ans 32: ( D ) female with turner's syndrome

Ans 33: ( B ) tRNA

Ans 34: ( D ) mRNA

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