a- A scientist was examining the offspring of an organism, suggest how to determine the type of reproduction by which these offspring were produced.
identical > asexual Non-identical >sexual
a- If you were observing different cells during their cell cycle suggest how to differentiate between the interphase and the prophase.
chromatin =interphase, condensed chromosomes =prophase 2) nucleus present =interphase, nucleus disappears =prophase 3) spindle fiber not present =interphase, s
b- By observing the human karyotype, suggest how to determine the gender (Male or female).
look at sex chromosomes xx =female Xy=male
How Many pairs of autosomes are there in this karyotype?
22 pairs of chromosomes
The rate of cell division varies greatly in different types of human cells, the data table below shows the replacement rates of many types of human cells.a- Which cell type has the shortest cell cycle?
lining of small intestine
The rate of cell division varies greatly in different types of human cells, the data table b- If you were asked to add one more cell that divides by meiosis to this data table. below shows the replacement rates of many types of human cells.
reproductive cell (ovary/testes)/sperm and egg
Question 12 Apply: Level 1-2 Why does the menstruation occur after the infertile phase?
to remove the broken endometrium and unfertilized eggs out of the body
Question 13 Apply: Level 3-4 By observing the 3 phases of the menstrual cycle, in which phases will it be impossible for this woman to get pregnant.
infertile and menstruation
Question 15 Analyze: Level 7-8 A pharmacist discovered a medicine for a certain bacteria that reproduces asexually, he tested this medicine and found it to be
…yes , since bacteria reproduce by asexual reproduction so all generations will be identical , same medicine will work for all bacteria
