BIOL 133 Week 7 Quiz

BIOL 133 Week 7 Quiz | Assignment Help | APUS 

Question 1 of 10

A few organisms have evolved to use mostly asexual reproduction. What must be true about these?

A.    They lack mitosis

B.     They are haploid.

C.     Offspring are genetically different from the parent.

D.    They are well-adapted to their environment.

Question 2 of 10

A newly-discovered butterfly species has a chromosome number of n=7. Match the total number of chromosomes in each type of cell.

A. 14

B. 7

C. 14

D. 7

1. Gamete

2. Zygote

3. Somatic cell

4. Daughter cell after telophase II

Question 3 of 10

A nuclear envelope does not usually form around each set of chromosomes in the haploid daughter cells in _________.

  A. interphase

  B. prophase I

  C. metaphase I

  D. anaphase I

  E. telophase I

  F. prophase II

  G. metaphase II

  H. anaphase II

  I. telophase II

  J. cytokinesis

 Question 4 of 10

Most organisms on earth spend large amounts of energy reproducing sexually, instead of using a more efficient method of asexual reproduction. Finding and competing for mates, meiosis and gamete production, and the complexities of fertilization could all be avoided if asexual reproduction was sufficient.

Why isn’t it?

  A. Genetic variability is of paramount importance so that organisms can compete and evolve; individuals with the benefit of genetic variability tend to have a selective advantage.

  B. Asexual reproduction is even more energetically costly.

  C. Asexual reproduction only is possible for organisms with a life cycle that supports a haploid free-living form.

  D. Asexual reproduction would be more advantageous, but a biological mechanism to create progeny asexually is not possible except in protests.

Question 5 of 10

Which event is similar between prophase I and prophase? Select all that apply.

 A. The nuclear membrane begins to disintegrate

 B. Spindle fibers appear

 C. Each chromosome is composed of two chromatids

 D. Chromosomes condense

 E. Each chromosome has potentially experienced crossover.

 F. Tetrads are present

Question 6 of 10

Meiosis and sexual reproduction increase diversity because

  A. they produce offspring extremely quickly

  B. they only need one parent

  C. they are archaic processes

  D. it allows for populations to adapt to environmental changes

  E. they will almost always have different offspring arise

Question 7 of 10

How does metaphase in meiosis I and meiosis II differ?

  A. Sister Chromatids are on the metaphase plate in meiosis I and tetrads are on the metaphase plate in meiosis II.

  B. Homologous chromosomes line up in meiosis I and duplicated chromosomes line up in meiosis II.

  C. All chromatids are the exact same in meiosis I and differ in meiosis II due to independent assortment

  D. The ploidy level remains the same in meiosis I but will be reduced in meiosis II.

Question 8 of 10

Which describes the relationship between gametes and spores?

  A. gametes can fuse to become a zygote, but spores can develop into organisms without forming a zygote

  B. gametes, not spores, can only contribute to genetic diversity in populations

  C. gametes are always haploid and spores are always diploid

  D. gametes come directly from sporophytes to develop into gametophytes

Question 9 of 10

What is an advantage of asexual reproduction? Select all that apply.

 A. it occurs quickly

 B. populates areas rapidly

 C. all organisms are clones

 D. high genetic diversity

 E. only need one parent

Question 10 of 10

A large family has a history of multiple aneuploid diseases such as Down Syndrome, trisomy-18 and Klinefelter Syndrome (XXY). The propensity to defects seems to be inherited, but the gene responsible is unknown.

What types of candidate genes would be most likely to lead to aneuploidy if they were mutated?

  A. Genes that are part of the G1 checkpoint of mitosis.

  B. Genes that encode proteins involved in chiasma formation.

Feedback: Since chiasmata help chromosomes to segregate, a problem in their formation miht lead to various kinds of aneuploidy.

  C. Histone genes.

  D. Genes that control DNA synthesis.