10.4 + 11.4 quiz Flashcards

1
Q

what is an embryo?

A

a development stage

the adult organism is gradually produced

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2
Q

what is the process by which cells become specialized?

A

differentiation

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3
Q

*how do cells become specialized for different functions?

A

they differentiate into many types of cells

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4
Q

what is able to do anything and develop into any type of cell?

A

totipotent

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5
Q

which cells are truly totipotent?

A

the fertilized egg

the cells produced by the first few cell divisions

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6
Q

after about 4 days, what does the human embryo form into?

A

blastocyst

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7
Q

what is a hollow ball of cells with a cluster of cells inside known as the inner cell mass?

A

blastocyst

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8
Q

what are the cells of the inner mass known to be?

A

pluripotent

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9
Q

what kind of cell can develop into most, but not all, of the body’s cell types?

A

pluripotent

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10
Q

what are the unspecified cells from which differentiated cells developed?

A

stem cells

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11
Q

what are pluripotent cells found in the early embryo?

A

embryonic stem cells

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12
Q

what are groups of cells that differentiate to renew and replace cells

A

adult stem cells

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13
Q

since adult stem cells are more limited, what are they referred to as?

A

multipotent

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14
Q

what can develop into many types of differentiated cells

A

multipotent

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15
Q

what are some benefits associated with stem cell research?

A

using undifferentiated cells to repair or replace badly damaged cells and tissues

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16
Q

whare are some issues associated with stem cell research?

A

it’s controversial-

arguments for it and against it both involve ethical issues of life and death

17
Q

what must occur to hold Mendel’s principle true?

A

1) an organism with 2 parents must inherit a single copy of every gene from each parent
2) when that organism produces gametes, those 2 sets of genes must be separated so that each gamete contains just 1 set of genes

18
Q

what is a cell that contains both sets of homologous chromosomes?

19
Q

how many sets of genes are found in most adult organisms?

A

2 complete cells of inherited chromosomes

2 complete sets of genes

20
Q

what is the symbol to represent the diploid number of chromosomes?

21
Q

what is a cell that only contains one set of chromosomes?

22
Q

what is the process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell?

23
Q

in what phase of meiosis does each replicated chromosomes pair with its corresponding homologous chromosome?

A

prophase I

24
Q

what is a structure called that contains 4 chromatins?

25
what process do tetrads go through?
crossing-over
26
what happens when prophase I ends?
a spindle forms and attaches to each tetrad
27
in what phase of meiosis do paired homologous chromosomes line up across the center of the cell?
Metaphase I
28
in what phase of meiosis do the spindle fibers pull each homologous chromosome pair toward opposite ends of the cell?
Anaphase I
29
in what phase of meiosis do the nuclear membrane form around each cluster of chromosomes?
Telophase I
30
what follows telophase I?
cytokinesis
31
in what phase of meiosis IIdo their chromosomes, each consisting of two chromatids, become visible?
Prophase II
32
how are meiosis and mitosis different?
- the replication and separation of genetic material - changes in chromosome number - number of cell divisions