FREE AND STUDY GAMES ABOUT BIO LECTURE CH. 13

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FREE AND STUDY GAMES ABOUT BIO LECTURE CH. 13

EXAM QUESTIONS

Actual Qs and Ans Expert-Verified Explanation

This Exam contains:

-Guarantee passing score -63 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: If a female of this species has 1 chromosome 12 with a blue gene and another chromosome 12 with an orange gene, she will produce which of the following egg types?

Answer:

1/2 blue and 1/2 orange gene eggs

Question 2: Which sample may represent a sperm cell?

Answer:

III (least DNA content) Question 3: Which of the following is true of a species that has a chromsome number of 2n=16?

Answer:

each cell has 8 homologous pairs Question 4: When pairs of homologous chromosomes separate during anaphase I:

Answer:

the sister chromatids remain attatched to one another

Question 5: Which of the following statements about genes is incorrect?

Answer:

• gene only is used in a specific cell type

Question 6: Independent assortment of chromosomes occurs in

Answer:

meiosis I only

Question 7: Homologous chromosomes synapse and crossing over occurs in

Answer:

meiosis I only Question 8: Eukaryotic sexual life cycles show tremendous variation. Of the following elements, which do all sexual life cycles have in common?

Answer:

(2, 3, & 4)meiosis, fertilization, and gametes

Question 9: Which steps take place in both mitosis and meiosis?

Answer:

separatation of sister chromatids (3) Question 10: How does the sexual life cycle increase the genetic variation in a species?

Answer:

by allowing independent assortment of chromosomes Question 11: If the cells were from a plant, which sample might represent a gametophyte cell?

Answer:

III (least DNA content) Question 12: After telophase I of meiosis, the chromosomal makeup of each daughter cell is

Answer:

haploid and the chromsomes are each composed of 2 chromatids

Question 13: If a horticulturist breeding gardenias succeeds in having a single plant with a particularly desirable set of traits, which would be her most probable and efficient route to establishing a line of such plants?

Answer:

clone the plant asexually to produce an identical one

Question 14: Synapsis of homologous pairs occurs; crossing over may occur

Answer:

prophase Question 15: A given organism has 46 chromosomes in its karyotype. We can therefor

conclude that:

Answer:

its gametes must have 23 chromosomes

Question 16: Which life cycle stage is found in plants but not animals?

Answer:

multicellular haploid Question 17: Centromeres of sister chromatids disjoin and chromatids separate in:

Answer:

anaphaseII

Question 18: What is a karyotype?

Answer:

A display of every pair of homologous chromosomes within a cell, organized according to size and shape Question 19: Tetrads of chromosomes are aligned at the equator of the spindle; alignment determines independent assortment

Answer:

metaphase I

Question 20: The human genome is minimally contained in which of the following?

Answer:

every human cell

Question 21: Experiments with cohesions have found that

Answer:

cohesions are protected from cleavage at the centromere during meiosis I

Question 22: Which life cycle is for fungi and some protists?

Answer:

II Question 23: Asexual reproduction results in identical offspring unless which of the following:

Answer:

mutation

Question 24: When does synaptonemal complex disappear?

Answer:

Late prophase of meiosis I Question 25: You have a microscope slide with meiotic cells and a light microscope. What would you look for if you wanted to identify metaphase I on the slide?

Answer:

tetrads lined up at the center of the cell Question 26: Whether during mitosis or meiosis, sister chromatids are held together by proteins referred to as cohesions. Such molecules must have which of the following properties?

Answer:

They must be removed before anaphase can occur Question 27: A cell divides to produce 2 daughter cells that are genetically different in

Answer:

meiosis I only