Luring chpt. 6
Terms
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- Cell division in bacteria and eukaryotes takes place in precisely the same manner. T/F`
- f
- Cancer is a disease characterized by uncontrolled cell division T/F
- T
- A karyotype is a type of gene.T/F
- F
- Doen syndrome occurs as a result of nondisjunction of chromosome 21 during cell division, T/F
- T
- Genes on chromosomes are the units of inheritance. T/F
- T
- Cells spend most of their lifetime in interphase. T/F
- T
- Human sperm and egg cells have 23 chromosomes. T/F
- T
- After mitosis and cytokinesis each new cell has a complete set of the parent cell chromosomes. T/F
- T
- A student can study a karyotype to learn about the
- number and structure of the chromosomes in a somatic cell.
- If non disjunction occurs,
- a gamete will recveive too many or too few homologues of a chromosome.
- A mutation caused by a piece of DNA breaking away from its chromosome and becoming attached to a nonhomologous chromosome is called
- translocation
- Trisomy is a mutation that results in a cell having an extra
- chromosome
- The point at which two chromatids are attached to each other in a chromosome is called a(n)
- centromere
- The cell cycle is monitored as each cell passes through
- checkpoints
- Whcih of the following show the correct sequence of the cell cycle?
- G1 S G2 M C
- The chromosomes in your body
-
exist in 23 pairs in all cells but gametes
b. each contain thousands of genes
c. form right before cells divide - Chromatids are
- . joined strands of duplicated genetic material
- A diploid cell is one that
-
a. has two honlogues of each chromosome
b. is designated by the symbol 2n
c. has chromosomes found in pairs - Hoew many chromosomes are in the body cells of an organism that has a haploid number of 8?
- 16
- The phase of mitosis that is characterized by the arrangement of all chromosomes along the equator of the cell is called
- metaphase
- In humans, the male determines the sex of the child because males have
- One x and one y chromosomes
- In humans, gametes contain
- 22 autosomes and 1 sex chromosomes
- The first three phases of the cell cycle are collectively known as
- interphase
- People with Down syndrome have
- 47 chromosomes
- Binary fission
- is the process by which bacteria reproduce
-
Mitosis is the process by which
a. microtubules are assembled
b. cytoplasm is divided
c. the nucleus is divided into two nuclei
d. the cell rests - the nucleus is divided into two nuclei
- The synthesis (S) phase is charaterized by
- DNA replication
- Normal human males develop from fertilized eggs containing which of the following sex chromosomes
- XY
- What are the chromosomes for Turner's syndrome?
- Y
- In humans, the specific condition caused by an extra chromosome 21 is called
- Down syndrome
- A picture of a cell's chromosomes is called a(n)
- karyotype
- Fertilization of the haploid sperm and egg results in the restoration of the _______________ number of chromosomes in the zygote
- diploid
- Chromosomes that are not involved in sex determination are called _____________________
- autosomes
- A fertilized egg is called a(n)
- zygote
- In humans, the genotype XX results in a
- female
- What is the difference between a somatic cell and an autosome?
- A "somatic" cell is a chromosome that is not a sex cell ( bone, liver) and a autosomes are pairs of chromosomes not involved in determining sex
- Describe the four stages of mitosis. (Short Answer)
- 4 stages of Mitosis