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Genetics

Exam2b

QuestionAnswer
The long and short arm of a chromosome are called q and p, respectively
Crossing over involves the genetics exchange between non-sister chromatids of homologous chromosomes
When do the sister chromatids separate during meiosis? anaphase II
Spindle fibers attach to the centromere at the kinetochore
Which of the following event occurs in meiosis but not mitosis? chromosome pairing
Immediately following anaphase of mitosis, a cell would have Twice as many chromosomes as it did before anaphase
Consider a diploid organism that has 3 pairs of chromosomes. Assuming no crossing-over occurs, what proportion of gametes would be expected to contain chromosomes of maternal origin only? 1/8
Consider a diploid organism that has 3 pairs of chromosomes. Assuming no crossing-over occurs, what proportion of gametes would be expected to contain some chromosomes from both paternal and maternal origin? 3/4
Consider a diploid organism that has 3 pairs of chromosomes. Assuming no crossing-over occurs, what proportion of gametes would be expected to contain some chromosomes from both paternal and maternal origin? 72
Chiasmata are formed during prophase 1
Homologous chromosomes separate during anaphase 1
In humans, how many tetrads are present during metaphase one of meiosis? 23
The newly-discovered organism Yawle nhoj, has a diploid chromosome number of 56. How many bivalents and tetrads would be expected to form during meiosis? 28,28
A cell contains 20 chromosomes immediately after completion of telophase of meiosis II. How many chromatids were present in metaphase I? 80
What is the correct order for the stages of the cell cycle? G1-S-G2-M
The end results of meiosis is the formation of 4 gentically different cells
Which of the following best describes the chromosomal composition of a daughter cell immediately following telophase I of meiosis? Haploid, and each chromosome consists of 2 chromatids
Mendel’s second law (independent assortment) can be explained by Random arrangements of homologous chromosomes during meiosis I
In humans, how many types of gametes are possible? 2^23
In mitosis, chromosomes consist of two chromatids from G2 of interphase through metaphase
Assume the amount of DNA in a cell immediately following mitotic cytokinesis is C. The amount of DNA during G1 of interphase would be C
In a particular animal, lung cells have 32 pairs of chromosomes. How many chromosomes does a sperm cell contain? 32
The five sub-stages of prophase I are, in order, L Z P dip dia
In an animal with 2n = 24, what is the total number of chromatids present at prophase I of meiosis? 48
In a plant with 2n = 40, what is the total number of chromatids present at prophase of mitosis? 80
The synaptonemal complex is the nucleoprotein complex that Holds homologous chromosomes together during meiosis
The events of meiosis II are most similar to mitosis
Meiosis I is called the reductional
In humans, how many chromosomes are present in metaphase II of meiosis? 23
Drosophila melanogaster has 2n = 8. How many bivalents are present in prophase I of meiosis? 4
The housefly, Musca domestica, has 2n =12. A fly would have _____ chromosomes in metaphase of mitosis; ________ sister chromatids in metaphase I meiosis and ________ chromosomes in prophase II of meiosis. 12,24,6
The organism Sllub adirolfhtuos has 16 pairs of long chromosomes, whereas the organism Scub yabapmat has 20 pairs of short chromosomes. The expected chromosome number in somatic tissues of a hybrid between these two organisms is 36
A meiotic cell cycle consists of _____ cell division(s) and ____ DNA replication(s). 2,1
G0 occurs between G1 and S
DNA in G1 is found as chromatin
Which of the following terms is NOT used to describe the position of the centromere in eukaryotic chromosomes? anticentric
Locus position of gene on chromosomes
Created by: 546846520
 

 



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