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Last Name, First Name
Class Period
These types of cells are all the cells in an organism except the reproductive gametes.
This type of asexual reproduction occurs throughout the lifetime of the organism.
These types of cells are located in the reproductive organs.
These cells make gametes that come together to create an offspring thus passing on genes to future populations.
Sexual reproduction occurs only at certain times in the life cycle of an organism.
This graphic represents both body and germ cells.
Half of your chromosomes come from your Dad.
And, half of our chromosomes come from your mother.
includes "autosomes" which consist of 22 homologous pairs.
sex chromosomes in mammals include an ____ chromosome
sex chromosomes include a ____ chromosome
Each pair of chromosomes is called a "homologous" pair because one comes from the mother and one from the father.
The letter _____ is used to represent the female sex chromosome.
The letter ___ is used to represent the male sex chromosome.
The gene affiliated with diabetes is located on chromosome number 2.
Hemophlia is associated with a gene on the X chromosome, number 23.
A sex-linked characteristic is associated with one of the sex chromosomes (X and Y). Since the Y chromosome is very small and doesn't contain very many genes, most of the sex linked characteristics are on the X chromosome.
You probably wouldn't have the deleterious characteristic because the same normal gene on its chromosome pair would mask its presence.
Somatic skin cells could be damaged and cause skin cancer, or nothing may happen.
There wouldn't be any deleterious consequences for your offspring.
Downs Syndrome is the result of an extra #21 chromosome. This is one case where the offspring usually survives having an additional autosome. Most of the time an additional or missing autosome results in an aborted embryo.
DNA is contributed to the embryo from the sperm cell.
The sperm cell has the ability to swim/move to locate the egg for fertilization.
The egg also contributes DNA to the embryo.
The egg provides all other materials necessary for the embryo to grow and develop.
An appropriate picture of spermogensis has been inserted for you. It is from your textbook Fig. 6.6, page 176. You should be able to recognize this figure and draw it yourself if asked.
A figure for oogenesis has been inserted for you. It is from your textbook Chapter 6.6, page 176. You should be able to recognize this figure and draw it yourself if asked.
The end result in oogensis is 1 egg and 3 polar bodies.
Three polar bodies result from an unequal division in female oogensis.
Gametogenesis litterly means "a gamete is born."
This is a figure of Prophase I.
Is the cell haploid or diploid?
This figure is Prophase II.
This cell is
This is Anaphase II.
The cell is
This figure shows the end of Telophase I and cytokinesis in Meiosis I.
The cell is
This figure shows a cell in Prophase II of Meiosis II.
These cells are
This figure shows Metaphase II of Meiosis I.
These cells are haploid.
This figure shows cells at Anaphase II of Meiosis II.
These cells are haploid.
This last figure shows the four cells created at the end of Telephase II and cytokinesis of Meiosis II.
Each of these four cells is diploid.
Two chromosomes that are very similar and carry the same genes are called "homologous chromosomes".
In Prophase I, the term to describe the homologus chromosomes pairing up is called "synapsis". This allows the chromosomes to come in very close contact allowing "crossing over" which increases genetic variability.
Genetic variability continues to be increased in Metaphase I when the homologous pairs of chromosomes assort independently along the metaphase plate.
Asking for the numer of autosomes in a human gamete.
To maintain the correct chromosome number of a species, the gametes must be haploid at fertilization to maintain a viable embryo and produce healthy offspring.
In both cases chromosomes line up randomly along the metaphase plate, however, in Metaphase I, homologous pairs line up and are pulled apart decreasing the cell from a diploid to a haploid cell; and in Metaphase II sister chromatids are pulled apart decreasing the amount of DNA in each cell.
The sister chromatids are still attached in Telophase I and in Telophase II the sister chromatids have been separated.
The number of chromosomes. The cell changes from diploid (2n) to haploid (1n).
The amount of DNA is reduced. Sister chromatids are separated. This doesn't reduce the number of chromosomes, just the quantity of DNA.