1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
aliina [53]
3 years ago
8

Contrast the genetic content and the origin of sister versus nonsister chromatids during their earliest appearance in prophase I

of meiosis. How might the genetic content of these change by the time tetrads have aligned at the equatorial plate during metaphase I?
Biology
1 answer:
Bogdan [553]3 years ago
7 0

Answer:

<u>Sister chromatids are identical  forms of chromatids  of a chromosomes. They are mostly  formed by semi-conservative replication of DNA molecule of a single  chromosome.Thus they  are  like  </u><u>'photocopies' </u><u> of  original parent  chromosomes; joined together at the Centromere</u>.

They are exactly similar in all ramification; with the same gene and allele compositions..

<u>However; slight differences  arise between the two identical sisters due to  </u><u>mutation</u><u> from</u><u> errors </u><u>at replication;and also in  the  length of telomere repeats.</u>

Non-sister chromatids are dissimilar forms of  chromatids of a chromosomes formed  when each half of  a chromosome  at fertilisation from separate   haploid sex-cells, of each parent. fused.They contain different genetic composition;because  they are not on the same homologous chromosomes.Therefore crossing -over ensure variation.

<u>However, they are genetically  similar in composition; if they  are contained in homologous chromosomes</u>. This is because Synapsis of bivalent of these chromosomes allow genetic material to be shared by  chromosomal crossing-over between the non-sister chromatids  on the chromosomes ; therefore identical genetic characteristics are shared .

Explanation:

You might be interested in
What protects and nourishes a developing fetus?
statuscvo [17]
The uterus protects and nourishes the fetus
3 0
2 years ago
Imagine that you are studying a species of invasive insect that has spread from Brazil to the Eastern coast of the U.S. You hypo
sertanlavr [38]

Answer:

Option (A) is the correct answer to this question.

Explanation:

If the hypothesis is correct then we shall be higher than Fst in the rest of the genome in the area environment  the cold-shock protein in the genomic region surrounding the cold-shock gene, except for the Fst.

  • Cold shock components are those product uses that are produced in cold and defend against cold stress. Fst is a gene of ice, present offshore of proteins from cold shock. During cold stress, the fist gene expression increase by several folds to increase cold shock protein production.
  • Other options are incorrect because they are not related to the given scenario.
4 0
3 years ago
An infant is admitted to the intensive care unit with multiple injuries. when the adolescent mother sees her infant for the firs
Len [333]
<span>The nurse needs to note the outburst, and report it to her supervisor. Although this comment seems at the surface to be an admission of guilt, perhaps there are other unseen circumstances. For example, perhaps she is blaming herself for letting the child out of her sight, and the injuries were actually caused by another while the child was out of her vigilance.</span>
6 0
3 years ago
What is an insect's antennae most similar too?
Amanda [17]

Insect's antennae is most similar to the <u>nose</u>

They are used for the sense of smell.

6 0
2 years ago
based on the living things in the pyramid, tell me what examples would fit into these categories: primary producers, primary con
algol [13]

Answer:

- Oak trees: primary producers

- Caterpillars: primary consumers

- Blue Jays: secondary consumers

- Hawks: tertiary consumers

Explanation:

A trophic pyramid, also known as ecological pyramid or energy pyramid, is a graphic representation that shows the relationships between different types of organisms (i.e., producers and consumers) at the trophic levels of an ecosystem. The primary producers are autotrophic organisms that obtain energy from sunlight and chemical compounds from nonliving sources (e.g., photosynthetic plants, algae, etc). The primary consumers are organisms that eat primary producers (e.g., herbivores), while secondary consumers are organisms that eat primary consumers (e.g., omnivores). Moreover, tertiary consumers are predators and/or omnivores that eat secondary consumers (e.g., hawks). Finally, decomposers (e.g., bacteria) are organisms that obtain nutrients and energy by breaking down dead organic material (i.e., dead organisms) at all trophic levels into nutrients.

5 0
3 years ago
Other questions:
  • During which period of pregnancy may drug exposure cause meromelia, cleft lip, and enamel hypoplasia?
    9·1 answer
  • In some cases of head injuries the cerebrum maybe be affected . The type of injury could cause a loss of (blank) and impaired (b
    11·2 answers
  • Human skin becomes dry during winter, making it more prone to infections than during summer. How do the sebaceous glands protect
    10·1 answer
  • A student argues that being separated geographically is the only way for speciation to occur. Why is he wrong?
    9·2 answers
  • The primer for DNA synthesis is an RNA molecule formed by the enzyme ________________.
    12·1 answer
  • One characteristic shared by a virus and a living cell is that both ?
    8·1 answer
  • Many farmers in California have_______of Acres that are followed and are not making them any money.
    9·1 answer
  • Match the following enzymes involved in DNA replication with their functions.
    12·1 answer
  • PLZZZZZ HELP MEH!!!!!
    10·2 answers
  • Please I’m begging you please help
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!