Based on textbook pages 270-285, 296-315, 326-349, and 360-379 and discussions 1
ID: 187816 • Letter: B
Question
Based on textbook pages 270-285, 296-315, 326-349, and 360-379 and discussions 19-30 in the study guide. Circle T if the statement is true; Fif it is false. L. TF Genetics is the area of study dealing with biological heredity 2. TFCrossing over is the only source of genetic variation 3. TF Meiosis divides the nuclear material of a cell to produce the sex cells egg and sperm. 4. TFAn organism that has the genetic makeup of TT is said to be heterozygous 5. TF In DNA, the base thymine (T) pairs with cytosine (C) 6. TF In a human cell, the majority of chromosomes are sex chromosomes. 7. TF Under normal rules of dominance, if two different alleles are present, the recessive allele is expressed A mutagen is a substance that can cause a change in DNA. The frequency of crossing over increases with the distance separating genes on a 8. T F 9. TF chromosome. 10. T F Codominant alleles are equally expressed. For each of the following, write on the blank line the letter of the word or phrase that best completes the statement or answers the question. 11.ADNA nucleotide does not contain (A) adenine. (B) cytosine. (C) thymine. (D) uracil. 12. Human blood type is determined by (A) multiple alleles. (B) sex-inked genes (C) codominant alleles. (D) a dominant allele. continue American School Lansing, IL A-(2341)-06/15-01Explanation / Answer
1) The given statement is true.
Genetics is the study of genes, genetic variation, and heredity in living organisms.
2) The given statement is false.
In species that reproduce sexually, the behavior of chromosomes during the process of meiosis and fertilization is responsible for most of the variation, which increases and arises in each generation. The mechanisms, which contribute to the genetic variation arising from sexual reproduction, independent assortment of chromosomes, crossing over and random fertilization.
3) The given statement is true.
Meiosis divides the nuclear material of a cell to produce the sex cells. Meiosis is a cell division, which reduces the chromosome number by half and forms four haploid cells. They are genetically different from the parent cell. Through the process of meiosis, sex cells are produced, which are unique with a half set of genetic information.
4) The given statement is false.
An organism that has the genetic makeup of TT is said to be heterozygous. The genetic makeup of heterozgous organism is Tt. The homozygous dominant organism has the genetic makeup TT.
Related Questions
drjack9650@gmail.com
Navigate
Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.