Karyotype A 1.) Karyotype A is the first set of chromosomes we will look at. Notice that the chromosomes are all paired up. How many pairs of chromosomes do you see? _23_
2.) Looking closer you will see that the pairs of chromosomes are paired according to certain likeness among the chromosomes. List some likenesses that you see among paired chromosomes: They seem to be alike in both shape and size
3.) Each karyotype chart also shows some important details about the sex of the organism. Looking at this particular karyotype chart what is the sex of the organism? __male_
4.) The chromosomes in the karyotype also show some light and dark bands. What do you think these "regions" of light and dark bands are?
5.) If you start with chromosome number 1 and go until chromosome number 22 you will see a trend in size correlation. What is this trend?
6.) How do you think this trend affects the number of genes present on any particular chromosome?
7.) Each of the pairs of chromosomes are numbered. How many pairs of NUMBERED chromosomes do you see? _
8.) What are these NUMBERED pairs of chromosomes called?
9.) There is a final set of paired chromosomes, these are called SEX CHROMOSOMES. What are the POSSIBILITIES for sex chromosomes? _ and _
10.) You will notice that the pairs of chromosomes are categorized in groups. These groups are lettered A->G. Can you see any reason or trends in the categorization of the chromosomes? If so, what is the trend?
11.) Every karyotype is specially named. This naming system is based on three things. One, the number of chromosomes (example: 46). Two, the sex of the organism (example: XX). And, three, any extra chromosomes that would cause a genetic defect (example: +18). What do you expect the name of this particular karyotype to be?
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