Meiosis p2

Are the genes on a recombinant chromatid the same as the original chromatid?

Yes because each chromosome inside the homologous pair contain the same genes in the same place meaning that if a switch between chromosomes occur it would not do anything to the genes present.

When does crossing over occur inn meiosis ?

Crossing over occurs during prophase one.

If there were three sets of homologous chromosomes in the cell, how many possible arrangements would there be for the tetrads in late prophase I?

8 arrangements are possible.

what is important event must take place during interphase before a cell proceeds to division?

DNa replication must take place during interphase before.

At what stage in meiosis one do the pairs of homologous chromosomes come together?

During the end of prophase one.

Considering what you know about DNA replication and meiosis, is either arrangement equally likely during the formation of tetrads in late prophase I? Explain.

During the formation of tetras they are also likely to line up in one side if the cell as another.

Meiosis and sexual reproduction each lead to variation in the genetic make-up of every person.With your group, explain how meiotic events, as well as the random fertilization of eggs and sperm, together lead to this genetic variation.

Random fertilization of the egg and sperm are caused when allele combinations on the chromosomes are randomized and then led to the chromosomes that end up in egg and sperm after meiosis two. When zygotes are formed because of random fertilization of eggs and sperm that means the gene combination will be different each time.

How many replicated chromosomes does the cells contain during prophase?

The cell contains 4 replicated chromosomes during prophase.

At what stages of meiosis one are the cells diploid and at what stages are they haploid?

The cells are diploid durning prophase, metaphase, and anaphase. Then in telophase after the 2 cells divide and 4 cells form they are haploid.

Describe what happens to the chromatids during crossover.

The chromosomes will begin to line up with their homologous pairs and the parts of the homologous pair switch places on the chromatids.

describe the relationship between the cells at the end of meiosis II and the original cell.

The new cells have one copy of half of the genetic information in the original cell.

Describe the relationship between the cells at the end of telophase and the original cell.

The new cells have two copies of half of the genetic information in the original cell.

When the chromosomes come together as homologous pairs, the arms of the sister chromatids may cross over. What are these crossover points called?

chiasmata

What two structures make up a single replicated chromosome?

sister chromatids make up a single replicated chromosomes.

Once the chromosomes have formed a pair, what are they called?

tetrads

In meiosis I, during anaphase I, which structures separated—homologous chromosomes or sister chromatids?

the homologous chromosomes separated.

During anaphase two what structures separated, sister chromatids or homologous chromosomes?

the sister chromatids separated

Considering the genetic makeup of the homologous pairs, will the cells at the end of telophase I be genetically identical to each other?

No, the cells at the end of telophase 1 will not be genetically identical to each other because the homologous pairs that separated and the alleles on the homologous pairs are not identical.

What phrase is used to describe the chromatids after crossing over takes place and the homolo-gous chromosomes separate?

The phrase used is Recombinant chromatids.

At the end of meiosis one, two cells have been produced. How many chromosomes are in each of these cells?

There's are two chromosomes in each of the two cells

At the end of meiosis 2 are four daughter cells are they haploid or diploid?

They are HAPLOID because they contain one chromosomes pair.

Are the alleles on a recombinant chromatid the same as the original chromatid?

no a switch in any part of the chromosome would effect the information in that chromotid because the chromosomes in the homologous pair have different alleles for each gene