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Terms in this set (44)
Mitosis results in 2 _____ cells, while Meiosis results in 4 _____ cells.
During _____ sister chromatids separate and go to opposite poles.
Which of the following is true about the process of Meiosis?
-4 cells are formed
-cells are genetically unique
The chromosomes found in our cells that are not sex chromosomes are termed
The process that reduces the number of chromosomes and shuffles the DNA is called
A human skin cell has 46 chromosomes. A haploid sperm cell from the same human would have how many chromosomes?
A diploid number for a cell 2n=
The human life cycle includes which two types of nuclear division?
Mitosis and Meiosis
In human males, gamete formation produces
A single cell called a _____ is formed by the fusion of gametes.
During Meiosis I, homologous chromosomes undergo crossing over while they are side by side in an event called
The term dyad refers to
A chromosome has 2 sister chromatids
A female has _____ chromosomes in all her somatic cells and her eggs have _____ chromosomes.
What process happens in Meiosis that does not occur in Mitosis?
-Homologous chromosomes are separated
-Homologous chromosomes line up
Select the functions of Mitosis in a multicellular animal.
-Growth of an organism
The period between Meiosis I and Meiosis II, during which no DNA replication occurs, is called
At the start of prophase II the cells are
After telophase II, the end result is:
4 genetically unique cells
A cell is prophase II contains ___ the amount of chromosomes that it had in prophase I.
The improper separation of chromosomes during meiosis I or meiosis II is called
During metaphase I, the genetic material is shuffled as
Homologous chromosomes line up randomly
Which of the following are the most likely outcome if meiosis did NOT cut the chromosome number in half in daughter cells in humans?
-When the sperm and egg cell fused during fertilization, the resulting zygote would have 92 chromosomes.
-The sperm and egg would each have 46 chromosomes.
What criteria are used to arrange chromosomes in a karyotype?
-The sex chromosomes are arranged together.
-They are arranged in homologous pairs.
-They are ordered according to size.
In normal females. the second X chromosome forms an inactive mass called a
The process in which the cytoplasm and organelles are divided during meitotic cell division is called
During which phase would you expect too find tetrads in a cell?
Reasons why Meiosis is important
-Introduces genetic variability in offspring.
-Meiosis keeps the chromosome numbers the same for subsequent generations.
Which of the following occurs during metaphase I
Tetrads align at the equator
The process in females that forms eggs, and includes meiosis, is called
Which of the following are characteristics of Turner Syndrome?
Which of the following occur as a result of fertilization?
Homologous chromosomes are moved to opposite poles of the cell during which meiotic phase?
The gender of someone with Klinefelter Syndrome would be
Which of the following occurs at the completion of both mitosis AND meiosis I?
Formation of 2 cells.
An association of four chromatids (2 pairs of chromatids from 2 homologous chromosomes) found in a cell undergoing prophase I of meiosis is called a
Down syndrome is a type of
A person with Turner Syndrome is a _____ with one _____ chromosome.
Which of the following are characteristics of Klinefelter Syndrome?
-No facial hair.
-Long arms and legs.
Which gene on the Y chromosome plays a crucial role in the development of male genitals?
Sex determining region Y (SRY)
A person with Turner Syndrome is indicated by which of the following?
What do the terms trisomy and monosomy refer to?
The number of homologous chromosomes in a zygote.
From which of the following does a zygote form?
The fusion of 2 haploid cells.
An organism that is trisomic has:
An extra chromosome.
In humans, a "XY" female may occur if there is a problem with:
The SRY gene.
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