All categories

3 years ago

Compare and contrast properties of sister chromatids and homologous chromosomes.

Biology

2 answers:

lubasha [3.4K]3 years ago

7 0

Answer:

Explanation:

Sister chromatids are regarded as replicated chromosomes. Sister chromatids are two identical copies of chromosomes held at the centromere that are formed as a result of replication. They are identical in the sense that they contain same alleles/gene sequence of the same genes.

Homologous chromosomes, on the other hand, are similar (in length, centromere position) but non-identical chromosomes. Homologous are non-identical in the sense that they may contain different alleles of a gene and are received from each parent. homologous chromosome contain four chromatids; two of which are sister chromatids and non-sister to the other two.

Both undergo meiosis where homologous chromosomes separate in meiosis I while sister chromatids separate in meiosis II but only sister chromatids undergo mitosis.

miss Akunina [59]3 years ago

5 0

Answer:

Homologous chromosomes

Basically at fertilization, sperm and oocyte from the mother provided each chromosome ,The pair of chromosome that emerged from the diploid cell formed is called homologous chromosomes. They contain exactly alike in structure, with the same genes and the same gene loci on the chromosomes..But the allele of the genes may not be the same and their DNA sequence are different.

At metaphase of meiosis I they formed a bivalent, at Synapsis. Crossing over of genetic materials takes place at the point chiasmata, and this results in genetic variation. Homologous chromosomes are pulled apart at Anaphase 1 of meiosis and into chromatids at Anaphase II.

Sister Chromatids

These are the products of a single chromosome replication during S-phase of interphase. That is one half of each copy of the chromosome replicated. They contain the same genetic composition and same sequence of DNA;and are joined together at common centromere,

They are separated from each other at Centromere ( unlike in homologous chromosomes at synapsis,) in metaphase of mitosis. But the separation takes place at Anaphase ii of second meiotic division in meiosis.

When they paired together they form dyad, unlike bivalent formed by Homologous chromosomes.

Explanation:

You might be interested in

It is sometimes observed that offspring do not resemble their parents for a particular character, even though the character vari

Yuki888 [10]

Answer:

Explained below

Explanation:

Sometimes offspring do not resembles their parents because of variation, so these character varies in population. When Darwin went to Galapagos Islands, he observed an amazing diversity of characters. He realized that there were many varieties of finches in the same island. He collected two sets of parent offspring data in two different years. Most of the parents who captured before their beak depth were known then he captured offspring with fledged and measured their beak depth. He calculated average beak depth of two parents and then compared with offspring beak depth.

8 0

3 years ago

Which is correct about the difference

Delvig [45]

Answer:

Explanation:

Mitosis results in 2 daughter cells, whereas Meiosis results in 4.

3 0

2 years ago

Who wrote the origin of continents and oceans

sergij07 [2.7K]

Answer:Alfred Wegener

Explanation:He searched the scientific literature for geological and paleontological.

6 0

3 years ago

Can someone plz help me?

Ber [7]

Answer:

C. all living things are made of one or more cells.

Explanation:

Sounds like it.

8 0

3 years ago

An insect with coloration to avoid being detected by a predator would be an example of.

Vilka [71]

An insect with coloration to prevent from being detected by a predator would be an example of Camouflage.

<h3>What is the importance of Camouflage?</h3>

Camouflage, commonly characterized as cryptic coloring, is a defensive tactic used by organisms to obscure their appearance, generally in order to blend in with their environment.

Camouflage is utilized by organisms to hide their location, identity, and movement. This enables prey to evade predators while also allowing predators to sneak up on victims.

An insect with coloration to avoid being detected by a predator would be an example of Camouflage.

Thus, the correct answer is Camouflage.

For more details regarding Camouflage, visit:

brainly.com/question/10913375

#SPJ1

8 0

2 years ago