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Ad libitum [116K]
3 years ago
5

Which statement best describes the human immunodeficiency virus (HIV) that has been shown to cause AIDS in humans?

Biology
1 answer:
Shkiper50 [21]3 years ago
4 0
<span>The first stage of HIV infection is known as the acute stage. The body responds by producing HIV antibodies and killer T- cells which are special lymphocytes that seek out and destroy invading pathogens such as viruses and bacteria. Two to four weeks after infection, the immune system launches an attack against HIV using these antibodies and killer T-cells, significantly reducing HIV level on blood. A percentage of the viruses however escapes this onslaught by hiding in other cells and continue to multiply.</span>
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A litter of four kittens includes one with black hair and blue eyes, one with black hair and orange eyes, one with brown tabby h
Hoochie [10]

Answer:

Law of independent assortment

Explanation:

According to Gregor Mendel who he performed a performed a cross involving two different genes i.e. a dihybrid cross, he stated that the allele of one gene will get sorted into gametes independently of the alleles of the other gene. He called this the LAW OF INDEPENDENT ASSORTMENT.

He obtained a 9:3:3:1 ratio when he performed this cross, which was only expected if each gametes contained the two genes in a combined state i.e. the dominant allele for one gene is equally likely to contain a dominant or recessive allele for the other gene in a gamete.

In this case, it appears the black hair and blue eyes are dominant alleles respectively while the tabby hair and orange eyes are recessive alleles respectively. If these alleles assort independently and combine in different ways, it will give rise to diverse genotypes and phenotypes in the kitten as illustated in the different phenotypic expression of eye color and hair color in the kitten.

5 0
3 years ago
What is a single unit of hereditary information?
ludmilkaskok [199]
GENE

Genetic variation determines inherited  differences between individuals . Our height or eye color are inherited from our parents, but our phenotype is also affected by environment such as the food we eat (diet), drugs we take, toxins surrounding us, climate, location, culture, physical accidents and lifestyle.A person may inherit a gene to be tall, but poor diet during childhood may cause stunted growth.<span>A Plant may have the potential for strong growth, but if the soil does not have sufficient minerals, the plant may hardly grow at all.</span>
3 0
3 years ago
Are centrioles affected by viruses
artcher [175]

Answer: Yes they are affected. By targeting the centrosome, some viruses hijack its functions, leading eventually either to cell death or to cell transformation.

Explanation:

5 0
2 years ago
Cells function together to form tissues. The four main types of tissues in animals are.
Katyanochek1 [597]

Answer:

4.4 Animal tissues (ESG6H) Animal cells with the same structure and function are grouped together to form tissues. There are four types of animal tissues: epithelial tissue, connective tissue, muscle tissue and nervous tissue.

Explanation:

4 0
3 years ago
_ are larger cells with membrane-boundemembrane-boundemembrane-boundemembrane-bounded organelles.
Klio2033 [76]

Eukaryotes are larger cells with membrane-bounded organelles. Prokarotes are not that large and do not have a nucleus or any memberane-bound organelles.


4 0
3 years ago
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