Genetic Organization
Identify the organelle that stores our genetic information
Nucleus
How many chromosomes are in the initial and resulting cell of mitosis?
46
The process of meiotic cell division normally results in the production of
four cells with half the number of chromosomes as the parent
Asexual reproduction requires how many parent cells?
one
The head of a sperm contains what organelle
nucleus
In DNA there are building block components called nucleotides. What is the base-pair rule?
A-T and G-C
The body cells of a kangaroo contain 12 chromosomes. How many chromosomes would be present in a kangaroo cell produced by mitosis?
12 chromosomes per cell
The body cells of a kangaroo contain 12 chromosomes. How many chromosomes would be present in a kangaroo cell produced by meiosis?
6
The formation of a bud (brote) is a result of
mitosis
structure that is responsible for the transport of oxygen to a fetus
placenta
A scientist used an electron microscope to slice a nucleus in half and observe its contents. He saw 23 bundled structures inside. These are known as?
Chromosomes
If a chemical that interrupts cell division is added to a culture of human liver tissue, which process would stop?
mitosis
Tissues develop from a zygote as a direct result of the processes of
mitosis and differentiation
Which sequence represents the order of some
events in human development?
zygote-tissues-organs-fetus or gametes- zygote- tissues- organs-embyo- fetus
Which hormone is responsible for maintaining/protecting the growing fetus?
Progesterone
A human skin cell contains 46 chromosomes. A frog sperm cell contains 12 chromosomes. Which pair of numbers shows the chromosome number of a normal gamete from each of these species?
human- 23 Frog 12
Name three things that mitosis is responsible for:
asexual reproduction, somatic cell division, and tissue repair/healing
The process of meiotic cell division normally results in the production of
four cells with half the number of chromosomes as the parent
A variety of plant produces small white fruit. A
stem was removed from this organism and planted
in a garden. If this stem grows into a new plant,
it would most likely produce
small white fruit only
Estrogen and progesterone increase the chance for successful fetal development by regulating activities within structure
uterus
Which process will increase variations that could be inherited?
Recombination of genes
What is the BRCA1 protein?
prevents cells from becoming cancerous
Even though each body cell in an individual contains the same DNA, the functions of muscle cells and liver cells are notthe same because
liver cells use different genes than musclecells
explain the process pf fertilization of identical twins.
one (1) egg cell is released from the ovary and one sperm cell fertilizes it to create a zygote. However, identical twins result because as the zygote begins to divide and create new cells, it divides one additional time!
In what structures, respectively, are gametes and reproductive hormones produce?
Ovaries and testicles