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3 years ago

A brown eyed person marries another brown eyed person, but they have a blue eyed child.

1 answer:

Nookie1986 [14]3 years ago

4 0

One of there ansestors must have had blue eyes, or might have been a genetic mutation. But it's rare to find such a random mutation. But we must keep in mind that reproduction of cells and when DNA is copied it could have a mutation. But the likely explanation would be that one of there ansestors or grand parents had blue eyes until the trait that forms brown eyes became more common in the family tree.

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What is Precisely means?

raketka [301]

Precisely is defined as exactly, specifically or with precision. ... When it is exactly 1:00, this is an example of a time when it is precisely 1:00. When you carefully place books on a shelf with great precision, this is an example of a time when you place the books precisely on the shelf.

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2 years ago

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A fern is in the sporophyte phase of its life cycle. Which of the following best explains what happens next in the fern’s life c

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Answer: a. Haploid spores are released to form zygotes, which grow into gametophytes.

A fern has two different stages of the life cycle; the sporophyte and gametophyte. In the sporophyte, spores are released. After this life cycle comes the gametophyte or the sexual phase, haploid spores are released to form zygotes, which grow into gametophytes.

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3 years ago

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Chromosomes often exchange segments of DNA during meiosis. How might this increase the survival of a species?

il63 [147K]

Answer:

Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase

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3 years ago

Define the following terms. Drag and drop the words into the appropriate blanks to complete the sentences.

FrozenT [24]

Answer:

1. replication

2. gene

3. strand polarity

4. translation

5. complementary base pairing

6. chromosome

7. antiparallel

8. transcription

9. allele

Explanation:

1. Replication is the process by which DNA is duplicated or the process of making another copy of DNA.

2. Gene is the physical unit of heredity i.e a segment of DNA transferred from parents to offsprings. A gene also encodes a useful products such as protein.

3. A DNA strand is a polar molecule, which is attributed to the phosphate group at the 5'-end of DNA and the hydroxyl group at the 3'-end of DNA.

4. Translation is the process whereby the information in a mRNA molecule is used to synthesize a protein.

5. Complementary base pairing is a phenomenon whereby Adenine (A) binds to thymine (T), guanine (G) binds to cytosine (C).

6. A chromosome contains of single long molecule of DNA coiled together around histone proteins. The chromosome is associated with different types of proteins.

7. In the double-stranded DNA molecule, one strand runs from 5' to 3' and the other runs from 3' to 5'. This is called ANTIPARALLEL nature of DNA.

8. Transcription is the process by which a DNA molecule is used to synthesize a mRNA single strand.

9. Allele is the alternative or contrasting form of a gene. Each allele is contributed by each parent

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4 years ago