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Meiosis

Meiosis and the Sexual Reproduction cycle

QuestionAnswer
The diploid number for a house fly is 12... the haploid number of chromosomes found in their gametes would be 6 ( gametes have half the number of chromosomes)
When you see chromosomes during cell division ... they are ( unreplicated or replicated) replicated
The duplicated chromosome has two sections called sister chromatids
what holds sister chromatids together in a duplicated chromosome centromere
Which type of cell division ( mitosis or meiosis) has homologous chromosomes pair up and then separate in later phases meiosis
( Mitosis, Meiosis or Both).... DNA replication occurs 1x prior to the process of division both
(Mitosis, Meiosis or Both)... involved in growth and repair of organisms mitosis
(Mitosis, Meiosis , or Both)... involved in providing genetic variation in organisms meiosis
( Mitosis, Meiosis, or Both)... involved in production of gametes meiosis
(Mitosis, Meiosis, or Both)... consists of one nuclear division or division process ( also list phases) mitosis : INTERPHASE ( part of cell cycle so very important because DNA replicates)... Prophase, Metaphase, Anaphase, Telophase (with cytokinesis)
(Mitosis , Meiosis, or Both)... consists of two sets of nuclear division or division processes ( list phases) meiosis: INTERPHASE( part of cell cycle so very important because DNA replicates)... Prophase I, MetaphaseI, AnaphaseI, Telophase I... Then divide again ...pro II, metaII, anaII, teloII
(Mitosis, Meiosis, or Both)... produces daughter cells that are genetically identical mitosis
Mitosis, Meiosis , or Both)... can produce 4 haploid cells that are genetically varied from the original meiosis
(Mitosis, Meiosis, or Both)... has a process called crossing over that helps create genetic variation meiosis
(Mitosis, meiosis, or Both)... occurs in almost any body area such as kidney, skin, bone, muscle) mitosis
(Mitosis, Meiosis, or Both)... only occurs in reproductive organs( testis or ovary) meiosis
(Mitosis, Meiosis, or Both)... synapsis occurs during this process meiosis
(Mitosis, Meiosis, or Both)... special events during prophase are synapsis and crossing over meiosis
(Mitosis, Meiosis, or Both)... occurs during asexual reproduction mitosis
(Mitosis, Meiosis or Both)... occurs during sexual reproduction meiosis
(Mitosis, Meiosis, or Both) ... also called reduction division... it starts with a diploid cell and ends up with haploid cells) meiosis
(Mitosis, Meiosis, or Both)... homologous chromosomes pair up and then separate as the process continues meiosis
( Mitosis, Meiosis, or Both)... homologous chromsomes are present Both ( they are present in all diploid cells.. and both processes generally start with diploid cells)
(Mitosis, Meiosis, or Both)... process that is used for reproduction for many unicellular organisms and some multicellular organisms at certain times mitosis
DNA in the relaxed form before it coils during cell division to make it easier to transport to new cells chromatin
DNA in the coiled form making it easier to transport to new cells chromosomes
Part of cell cycle where DNA is replicated Interphase ( in both mitosis and meiosis... )... only one time in each process
Number of cells produced by mitosis and how they compare to original cell 2, they are identical ( diploid to diploid.... or in plants they are haploid to haploid) IDENTICAL
If you have 12 chromosomes in a cells and it does the process of mitosis .... the new cells will each have ___ chromosomes 12 chromosomes they are identical to the original
What is another name for a body cell somatic cell
What is a symbol for diploid and what does diploid mean? 2n .... this is a cell with chromosomes in pairs (they are called homologous pairs)
What is the symbol of haploid and what does haploid mean? n.... this is a cell with 1 chromosome from each pair
when do the chromosomes first become visible prophase in mitosis or prophase 1 in meiosis
when does synapsis and crossing over occur in meiosis prophase 1
what is synapsis that occurs during meiosis? it is when the homologous chromosome pairs match up to form a structure with 4 chromatids called a tetrad
What is a tetrad in meiosis it is what happens as a result of synapsis in meiosis and is 4 chromatids next to each other that can get twisted together and exchange genetic information
during meiosis, when do you see tetrads lined up on the equator of the cell metaphase I
during meiosis, when do the homologous chromosomes separate in pairs and move to the poles anaphase 1
during meiosis,, when do you have haploid cells BUT with 2 sister chromatids on each chromosome ( or the DNA still doubled) Telophase 1
Which part of meiosis is just like mitosis when looking at the prophase,anaphase, and telophase Meiosis II
What is true about the number of chromosomes found in gametes compared to somatic cells they have half of the number of chromosomes of a somatic cell
Describe the number of chromosomes in a human somatic cell they have homologous pairs, they are diploid, there are 46 chromosomes in 23 pairs
Describe the number of chromosomes in a human gamete these cells are haploid, they have one member of each homologous pair and their are 23 unpaired chromosomes
give the correct sequence showing the life cycle of a human starting with diploid adult and getting back to diploid adult diploid adult, meiosis, haploid gamete,(haploid egg and haploid sperm from different organisms), fertilization, diploid zygote, mitosis, diploid adult
Where does meiosis occur in a female ovary
where does meiosis occur in a male testis
What process produces a sperm or egg meiosis
which process ensure that the chromosome number stays constant generation after generation meiosis ( and then fertilization)
which process ensures that the chromosomes are constant from one cell to the next mitosis
What is the exchange of genetic material between nonsister chromatids called crossing over
true or false...replication of DNA occurs before the start of meiosis I and again before meiosis II false only before meiosis I
during which meiosis phase do the sister chromatids separate and move toward the poles anaphase II
In ___ the spindle disappears as the nuclear envelopes form. The plasma membrane furrows in an animal cell to give two complete cells, each of which has the haploid number of chromosomes each with one chromatid ( 2 cells have been doing this division ) telophase II
When ___ are formed the cytoplasm doesn't divide evenly during the 2nd cytokinesis ... therefore there is one larger cell and 3 smaller cells produces ... only one usually functions as the ____ egg (ova)
When _____ are formed the cytoplasm divides evenly during the 2nd cytokinesis ... therefore 4 are formed from each cell and there are many ______ formed sperm ( spermatozoa)
what term describes the process where the egg and sperm combine ( or the union of gametes) fertilization
what is the first cell produced by fertilization a zygote
what is the chromosome number of a zygote diploid
What two types of cell division occur in the human life cycle meiosis and mitosis ( both are important)... meiosis makes the sperm or egg... and mitosis is needed for growth
what are 3 things that are true about homologous chromosomes they are the same size, they have their centromere's in the same location and they carry genes in the same location coding for the same trait...
True or False... 2 questions.... Do homologous chromsomes code for the same traits? Do homologous chromosomes have to have the identical information for the traits they code for #1 true #2 false.. example (if the trait is tongue rolling... one can code for rolling and the other could code for non-rolling... or Aa)
which type of reproduction has a shuffling of genetic information sexual
sex cells are called gametes
Variation among offspring in sexually reproducing organisms comes from ( 3 things) crossing over random fertilization, and random lineup of chromosomes during metaphase I
reproduction that makes identical offspring and occurs in many unicellular organisms and some multicellular organisms at certain times asexual (without sexual)... no eggs, sperm, meiosis or fertilization
What are traits and what causes the traits in an organism they are characteristics passes on from parents to offspring... they are determined by DNA located in small sections of a chromosomes called genes that code for proteins
Why can't mitosis be used to make gametes mitosis made gametes in humans would have 46 chromosomes, when they united the zygote would have 92 chromosomes, double the number you should have... with meiosis each gamete has 23 chromosomes making a zygote with 46 ( correct # for humans)
What are three stages of development after a zygote embryo, fetus, and baby
Cells cannot just do mitosis during development.. what else has to happen ( it also starts with a D) differentiation... when generalized cells become specialized for various functions
What causes differention and development the different genes are turned on or off... each cell has the same DNA but differention causes the various cells to form
Created by: shemehl