1. If the two sister chromatids are the same, how are they called? 2. Which specific parts exchanged genetic information during cross over? 3. What is crossing over? 4. When will crossing over occurs? Why? 5. What will happen after crossing over? 6. How do meiosis contributes to genetic variation, while mitosis does not? 7. Why is crossing over important for evolution of species?

1. If the two sister chromatids are the same, how are they called? 2. Which specific parts exchanged genetic information during cross over? 3. What is crossing over? 4. When will crossing over occurs? Why? 5. What will happen after crossing over? 6. How do meiosis contributes to genetic variation, while mitosis does not? 7. Why is crossing over important for evolution of species?

Biology: The Dynamic Science (MindTap Course List)

4th Edition

ISBN:9781305389892

Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Publisher:Peter J. Russell, Paul E. Hertz, Beverly McMillan

Chapter11: Meiosis: The Cellular Basis Of Sexual Reproduction

Section: Chapter Questions

Problem 2TYK: Which of the following is not associated with sperm production? a. daughter cells identical to the...

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Which statement best describes the genetic content of the two daughter cells in prophase II of meiosis? haploid with one copy of each gene haploid with two copies of each gene diploid with two copies of each gene diploid with four copies of each gene
The DNA content in a diploid cell in G2 is X. If that cell goes into meiosis at metaphase II, the DNA content will be: a. 0.1 X. b. 0.5 X. c. X. d. 2X. e. 4X.
Assuming that independent assortment occurs during meiosis, what type(s) of gametes will form in individuals with the following genotypes? a. AABB b. AaBB c. Aabb d. AaBb
Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With respect to X chromosome alleles, how many different types of gametes can a male produce? b. If a female is homozygous for an allele on an X chromosome, how many types of gametes can she produce with respect to that allele? c. If a female is heterozygous for an X chromosome allele, how many types or gametes can she produce with respect to that allele?
Human females have two X chromosomes (XX); males have one X and one Y chromosome (XY). a. With respect to X-linked alleles, how many different types of gametes can a male produce? b. If a female is homozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele? c. If a female is heterozygous for an X-linked allele, how many types of gametes can she produce with respect to that allele?
Explain how the random alignment of homologous chromosomes during metaphase I contributes to the variation in gametes produced by meiosis.
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Match each term with the best description. __ interphase a. different forms of a gene __ metaphase I b. useful for varied offspring __ alleles c. none between meiosis I and meiosis II __ zygotes d. chromosome lineup __ gametes e. haploid __ males f. form at fertilization __ prophase I g. mash-up time
Assuming that independent assortment occurs during meiosis, what type(s) of gametes will form in individuals with the following genotypes? a. AABB b. AaBB c. Aabb d. AaBb
Which of the following is not associated with sperm production? a. daughter cells identical to the parent cell b. variety in resulting cells c. chromosome number halved in resulting cells d. four daughter cells arising from one parent cell e. 23 chromosomes in the human sperm
1. A diploid organism has the genotype I1I2V1V2 Y1Y2 on different chromosomes. Diagram only these three pairs of chromosomes to represent: Any correct mitotic phase, label the alleles. Any correct meiotic phase, label the alleles. Compare the results of mitosis with the results of meiosis in terms of the number of chromosomes and the genotype of the cells produced.
A primary spermatocyte has the genotype DdEe. These genes assort independently at Meiosis I. Show the chromosomes containing these genes at Metaphase I, Telophase I and Telophase II using diagrams. Diagrams must be clearly labelled and show metacentric chromosomes undergoing meiosis.