Question

23. The concept that a random distribution of alleleş occurs during gamete formation is the (A) law of segregation. (C) law C (B) concept of dominance. (D) concept of probability f independent assortment. 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? 26.The cross TiPpx TiPpis a 27. The diploid number of chromosomes in humanis is 28. micrograpi t hat containś pairs of homologous chromosomes granged in decreasi 29. A cross between two plants produces 100 offspring. Of the offsping, 75 have flat lea 30. AUsing the information from question 29 above, what is the probability that any give (A) 0 (B) 2 4 (D) 8 (A) monohybrid cross. (B) homozygous cross. (D) tetrahybrid cross. dihybrid cross. (A) 48. (B) 47, 46. (D) 23. size is called a (A) metaphase plate. (B) pedigree. (C) linkage map. Dkaryotype and 25 have curled leaves. What is the ratio of flat leaves to curled leaves? (A) 75 in 100, or 3 in4 75:25 (C) 25 in 100, or 1 in 4 (D) 25:75 offspring will have flat leaves? 75 in 100, or 3 in4 (B) 7525 (C) 25 in 100, or l in4 (D) 2575 31. The plants crossed in questions 29 and 30 are most likely both (A) heterozygous. (B) homozygous recessive. (C) homozygous dominant. A person with an XO sex chromosome (A) normal male. (C)female with Turner's syndrome. (D) male with Klinefelter's syndrome. What substance picks up amino acids and carries them to the ribosomes? (A) mRNA (B) RNA (C) tRNA (D) DNA combination is a (B) normal female. 33. 34.- -what substance carries information from the nucleus tothe cytoplasm? (A)mRNA (B) rRNA (C) tRNA (D) DNA cont

Answer 1

Hi Answer:

Q.23. The concept that random distribution of alleles occurs during gamete formation is the

Answer: Option C [law of independent assortment] This law describes that how different genes independently separate from one another during the development of the reproductive cells.

Q.24. At the end of mitosis how many haploid cells are there

Answer: Option A [0] at the end of mitosis there is the formation of two cells which are diploid in nature, no haploid cell formed.

Q.25.At the end of meiosis II, how many haploid cells are there?

Answer: Option C [4] at the end of meiosis II, 4 haploid cells are formed.

Q.26.The cross TtPp X TtPp is a

Answer: Option C [dihybrid cross] Dihybrid cross is the cross between two different genes that differ in two observed traits.

Q.27.The diploid number of chromosomes in human is

Answer: Option C [46] in humans there are 23 pairs of chromosomes in which 22 are autosomes and 2 pair is sex chromosomes and total diploid number of chromosomes is 46.

Q.28. A micrograph that contains pairs of homologous chromosomes arranged in decreasing size is called a

Answer: Option D [Karyotype] Karyotypes are also known as the pictorial representation of the chromosomes of an organism where homologous chromosomes are arranged in order of decreasing size.

Q.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?

Answer: Option B [75: 25] this ratio can be represented as 3:1.

Q.30. Using the information from question 29 above what is the probability that any given offspring will have flat leaves?

Answer: Option A [75 in 100, or 3 in 4]

Q.31.The plant crosses in question 29 and 30 are most likely both

Answer: Option A [heterozygous] when a diploid organism contains two different alleles of a gene then it is known as heterozygous. In the present case the gene present in leaf cell has two alleles i.e. flat or curl.

Q.32. A person with an XO sex chromosomes combination is a

Answer: Option C [female with Turner's syndrome] The person with XO genotype is known as XO or Turner syndrome and this affects only females because in normal conditions female has two copies of X chromosomes but in XO they have only one copy.

Q.33. What substance picks up amino acids and carries them to the ribosomes?

Answer: Option C [tRNA] Transfer RNA (tRNA) acts as the carrier of amino acids and carry them to the ribosomes during protein synthesis.

Q.34. What substance carries information from the nucleus to the cytoplasm?

Answer: Option A [mRNA] Messenger RNA (mRNA) carried the information from genes present in the nucleus to the cytoplasm. Inside nucleus transcription took place which produce mRNA from DNA and after that this mRNA is exported from nucleus to cytoplasm through the pores of the nuclear membrane.