All categories

2 years ago

Compare and contrast properties of sister chromatids and homologous chromosomes.

Biology

2 answers:

lubasha [3.4K]2 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]2 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

1.This method of reforestation is done by natural means with the aid of the wind,birds,rodents and running water which scatters

ANEK [815]

Answer:

T. Natural Reseeding.
D. Species Diversity
A. Ecosystem Diversity.

Explanation:

Natural reseeding uses natural elements and actors to plant the seeds of trees. These elements and actors include water, wind, birds, rodents and other actors capable of scattering seed.

Species diversity is what defines the differentiation between the different species in an ecosystem and Ecosystem diversity relates to how biological communities/ ecosystems can be different from each other based on the organisms and food chains available in each.

8 0

2 years ago

Hello everyone! just need help with questions 5 and 6!:) thankyou!!

worty [1.4K]

Answer:

5.) While it appears in a balanced ecosystem that nothing is changing, there is indeed either subtle or gradual changes that constantly happens through natural succession.

6.) Predator-prey relationships achieve a state of balance:

a.) Prey- They are food for predatory animals and help them thrive with nutrients that they possess.

b.) Predator- They help reduce overpopulation for prey

Explanation:

I hope this helped! :)

4 0

2 years ago

If you had a sample organism and wanted to measure its rate of cellular respiration, which of the following methods would provid

Andrei [34K]

<h2>Aerobic Respiration</h2>

Explanation:

Aerobic cellular respiration is the process by which the cells of a living being separate nourishment and transform it into the energy they have to play out their essential functions
The most importance of aerobic respiration in living things can't be belittled Without this process, no living thing would survive
Oxygen is a critical component of Aerobic respiration in many animals
The motivation behind the oxygen is so significant is on the grounds that it assumes a critical job in the mitochondria, the powerhouses of the cell
The mitochondria has two layers. On the inward layer, 4 gatherings of protein structure the Electron Transport Chain

8 0

3 years ago

PLEASE HELP polysaccharides, triglycerides, and proteins are similar in that they a) all contain nitrogen in their monomer build

Degger [83]

Answer:

Are synthesized from monomers by hydrolysis process

4 0

2 years ago

What is all matter made of?

Blababa [14]

Answer All matter is made up of particles called atoms and molecules

8 0

3 years ago