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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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I NEEEEDDDDD HELP PLEASE
Morgarella [4.7K]

Answer:

First question is Yy

Explanation:

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3 years ago
The landforms indicated by the arrows in the image are common features off the coast of Mississippi. What are these features?
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Answer:

b) barrier islands

Explanation:

I looked up Mississippi barrier islands and they were a thing.

6 0
2 years ago
Having freckles (F) is dominant over not having freckles (f). A parent with freckles is crossed with a parent without freckles.
Step2247 [10]

Answer:

This is a trick question, and only because the question is vague

Explanation:

Use a Punnet Square to figure out the percentages.

If the parent with freckles (let's just call them Parent A) is homozygous dominant, their genotype would be FF.  The parent without freckles (Parent B) has a genotype of ff.

In any situation, the probability of these two having a child that is homozygous dominant for freckles is 0%.  (see punnet squares for more info).  

Now here's where it gets a little more confusing because the question is kind of vague on this.

Assuming that Parent A is homozygous dominant (both genes for this are dominant (FF)), then the probability of having a heterozygous (non-identical genotype letters, meaning they carry the recessive trait) genotype is 100%.  However, if Parent A is also heterozygous, then that percentage decreases to 50%

For Situation A (Parent A is homozygous dominant), the probability of a homozygous recessive genotype is 0%

For Situation B (Parent A is heterozygous dominant), the probability of a homozygous recessive child is 50%.

Please see the Punnet square I made for more information.

Key:

- Homozygous Dominant: FF

- Heterozygous Dominant: Ff

- Homozygous Recessive: ff

(heterozygous recessive does not exist, because that would mean one of the genes is dominant, which would overpower the recessive gene)

I really hope this helps, and if you're confused by this, please do not hesitate to let me know!

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How to remember: "auto" means they make it automatically by their own.
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What happened to the perfume molecules when you opened the lid on the box
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They spread into the surrounding area
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