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noname [10]
3 years ago
8

Why are there two copies of each chromosome? Question 5 options: One copy comes from each parent Chromosomes were duplicated in

mitosis The chromosomes copied themselves through DNA replication
Biology
1 answer:
wariber [46]3 years ago
8 0

Answer:

One copy comes from each parent

Explanation:

The correct answer would be that <u>one copy comes from each parent</u>.

<em>During gamete formation, the chromosome number in the sex cells is usually halved to produce haploid gametes. Haploid gametes fuse together and donate their chromosomes to form a diploid zygote during the fertilization process. Hence, one copy of the two chromosomes in diploid organisms comes from each parent.</em>

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What would happen if gametes were not haploid?
Yanka [14]
If haploid didn't occur on gametes, it would occur on diploid, which would increase the number of chromosomes, and the child would have a lot of them.
So, what would happen if gametes were not haploid is that B. the offspring would have double the number of chromosomes it is supposed to have.
5 0
3 years ago
Plsss helppp 40 extra points and brainleist
Semmy [17]

Answer:

The virus lacks strcutures to replicate genetic material.

Explanation:

They can replicate it, but don't have structures to do it without the help of a cell. They USE the cell to replicate it but cannot do it themself.

Virus lacks genetic matrial? It has DNA.

Protective outer shell? Ptotection has nothing to do with it.

Movement? They cannot duplicate without cells.

3 0
3 years ago
What is meant by the genetic code being nearly universal?
Veseljchak [2.6K]

A lot of DNA is structural and doesn't pertain to any genetics while it only takes a small change to change something big. DNA mainly uses 4 different chemicals to change itself, not giving a lot of variety. Most animals share around 98% of the same dna with each other. Humans share 50% of their DNA with a banana. Pretty much everything shares the same double helix design as well. So a lot of genetic code looks similar.

4 0
3 years ago
Marfan syndrome is a dominant trait. A cross between a homozygous dominant and a heterozygote would produce what phenotypic rati
umka2103 [35]

Answer:

The correct answer is- 4:0

Explanation:

Marfan syndrome is a genetic problem which affects the connective tissue in the body. The trait for this disease is autosomal dominant which means even one abnormal copy of this gene in the offspring or individual is sufficient to cause this syndrome.

Let S is the allele that is dominant for this syndrome and s is recessive. So if a cross between homozygous dominant(SS) and heterozygous individual (Ss) occurs than all the offspring would have this syndrome.  

                                   S      s

                              S  SS   Ss

                              S  SS   Ss

Therefore all 4 offspring would have at least one dominant allele which is sufficient to cause this syndrome. So the phenotype ratio would be 4:0.

                       

3 0
3 years ago
Why does the oxygen atom in a water molecule have a negative charge?
Yuri [45]

Answer:

the answer is b oxygen attract electrons more strongly than hydrogen does

6 0
3 years ago
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