Answer:
Two complementary strands of DNA come together thanks to hydrogen bonding between the nitrogenous bases that allows DNA to make a ladder-like form that twists into the famous double-helix. ... In DNA, there are four nitrogenous base options: adenine (A), thymine (T), cytosine (C) and guanine
Explanation:
In biology, specifically in terms of genetics and DNA, complementary means that the polynucleotide strand paired with the second polynucleotide strand has a nitrogenous base sequence that is the reverse complement, or the pair, of the other strand.
So, for example, the complement of guanine is cytosine because that's the base that would pair with guanine; the complement of cytosine is guanine. You would also say the complement of adenine is thymine, and vice versa.
This is true along the entire DNA strand, which is why the two strands of DNA are called complementary strands. Each and every base on a single strand of DNA is going to see its complement matched with it on the other strand.
DNA content is halved in both meiosis I and meiosis II. Ploidy level changes from diploid to haploid in meiosis I, and remains haploid in meiosis II.
<span>During anaphase of both meiosis I and meiosis II, the DNA content (number of copies of chromosomes) in a cell is halved. However, the ploidy level changes only when the number of unique chromosome sets in the cell changes. This occurs only in meiosis I (where separation of homologous chromosomes decreases the ploidy level from 2n to n and produces daughter cells with a single chromosome set).</span>
Answer:
memory cells
Explanation:
Your body recognizes the bacteria as an invader because of the proteins shape on the surface of it. The shapes are different than those of the ones in the human body.
- White blood cells work together to fight the invaders. One type of the white blood cells make antibodies to fight the invaders. They stick to the bacteria's surface which kills the bacteria or disables them.
-Eventually your body will get rid of all the bacteria and you'll recover. Some white blood cells then become memory cells.
------Memory cells will help you fight off the bacteria if they invade the body again. The immune system will respond so quickly that you won't get sick.
Answer:
Genotype & Phenotype
BbFf - 4
bbFf - 4
Bbff - 4
bbff- 4
Phenotype
BbFf – Black Hair with six fingers
bbFf – red hair with six fingers
Bbff – Black hair with five fingers
Bbff – red hair with five fingers
Explanation:
Given
Black hair allele is represented by "B"
Red hair allele is represented by "b"
Trait of having six fingers is represented by "F"
Trait of having five fingers is represented by "f"
Also , B is dominant over b and F is dominant over f
Genotype of sally having black hair and five fingers when her father has red hair is Bbff
Genotype fo Bill having red hair and six fingers when his mother had five fingers is bbFf
Bbff * bbFf
Bf bf Bf bf
bF BbFf bbFf BbFf bbFf
bf Bbff bbff Bbff bbff
bF BbFf bbFf BbFf bbFf
bf Bbff bbff Bbff bbff
Genotype & Phenotype
BbFf - 4
bbFf - 4
Bbff - 4
bbff- 4
Phenotype
BbFf – Black Hair with six fingers
bbFf – red hair with six fingers
Bbff – Black hair with five fingers
Bbff – red hair with five fingers
age, strength of immune system,
health, personal hygiene, diet.
Our body has many ways to protect itself from infections. It
needs us to know and understand the normal ways your body does this, and how
cancer and cancer treatment change this process. This may assist us appropriate
understand why infections can expand so quickly and be so serious in people
with cancer.
If we
get infected through the skin or mucous membranes, the job of protecting the
body shifts to our immune system. Our immune system is a composite grid of
cells, signals, and organs that work jointly to help kill germs that cause
infections. Many of these are special blood cells that travel in the blood
until they find germs to attack. Others fill part of their moment in the blood
and the rest of their time in immune system body part.
White
blood cells are part of the immune system. (Red cells and platelets are not.)
There are different types of white blood cells, and they each have a key role
in the body’s defense against germs:
<span>
Neutrophils
Lymphocytes
(which include T-lymphocytes and B-lymphocytes)
Monocytes
<span>Macrophages</span>
</span>
