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Soloha48 [4]
2 years ago
9

Homologous chromosomes may exchange segments; this is called crossing over. Crossing over increases genetic variability. When do

es crossing over occur?
Question 2 options:


Meiosis II



Mitosis



Both mitosis and meiosis--crossing over may occur at any time during the cell cycle.



Meiosis I


Question 3

In order for meiosis to create four, genetically different gametes, DNA replication must occur. Which of these best describes when DNA replication would occur?


Question 3 options:


prior to meiosis II



prior to meiosis I and meiosis II



prophase I in meiosis I



prior to meiosis I

Question 4 (1 point)
The embryo's development as seen here represents which processes in the development of any multicellular organism?


Question 4 options:

meiosis followed by mitosis.


mitosis and cell differentiation.


protein synthesis followed by meiosis.


meiosis and cell differentiation.

Question 5
Why do some organisms reproduce aseggsually?

Question 5 options:

To rapidly produce like offspring


To increase genetic diversity


To have a variety of offspring at the same time


To get rid of genetic problems while reproducing
Biology
1 answer:
Serhud [2]2 years ago
6 0

A) Crossing over occurs in : Meiosis I ( D )

B) DNA replication would occur : Prior to meiosis I and meiosis II ( B )

C) The embryo's development represents ; meiosis and cell differentiation ( D )

D) Some organisms reproduce aseggsually ; To rapidly produce like offspring

<h3>What is Crossing over and DNA replication</h3>

Crossing over involves the swapping of genetic materials, and it occurs in prophase I of meiosis before meiosis II the crossing over of genetic materials are over. while DNA replication is the process whereby DNA make an exact copy of itself during the process of cell division and this process occurs prior to meiosis I and meiosis II

The development of an embryo in the missing diagram represents meiosis and cell differentiation.

Hence we can conclude that the answers to your questions are as listed above.

Learn more about Homologous chromosomes :  brainly.com/question/8253366

You might be interested in
A specialized structure within a cell that has its own specific function is known as a/an _______.
vichka [17]

Answer:

Organnelle

Ribosomes

Nucleus

Archaeabacteria

Phospholipid bilayer

Lipases

Explanation:

1. Organnelles are specialized structures in a cell designed to perform a particular function that will make the cell normal e.g. ribosome, Chloroplast, mitochondrion are examples of organnelles.

2. The Rough Endoplasmic Reticulum (RER) is one of the two endomembranous systems in the cell. It is characterized by its rough appearance which occurs as a result of ribosomes attached to its surface. This attachment of ribosomes makes its function related to protein synthesis.

3. Nucleus is a membrane bound organnelle found only in EUKARYOTIC cells. It houses the genetic material (DNA) of a cell and acts as the brain by directing all of the cellular activity of that cell.

4. Archaeabacteria is one of the six kingdoms in the hierarchical classification of living organisms. They contain unicellular and prokaryotic organisms that are uniquely characterized by their ability to survive extreme conditions e.g high temperature.

5. The plasma membrane is an outer covering that bounds the cells of both Prokaryotic and eukaryotic organisms. According to the fluid mosaic model that describes the structure of the cell membrane, it contains a phospholipid layer that confines its selective permeability upon it i.e. ability to control what goes in and out of the cell. This is due to the amphipathic nature of the phospholipid i.e. contains an hydrophobic and hydrophilic region.

6. Lipases are enzymes that are involved specifically in the breakdown of lipids and fat molecules into fatty acids and glycerol.

5 0
2 years ago
Widow's peak is dominant to straight hairline, and freckles are dominant to no freckles.
xenn [34]

The phenotype ratio would be 25% each for widow's peak and freckles, widow's peak without freckles, straight hairline with freckles, and straight hairline without freckles.

<h3>Dihybrid crossing</h3>

Genotype of the heterozygous parent: HhFf

Genotype of the other parent = hhff

Crossing the two parents:

HhFf = 1/4 = Widow's peak, freckles

Hhff = 1/4 = Widow's peak, no freckles

hhFf = 1/4 = straight hairline, freckles

hhff = 1/4 = straight hairline, no freckles.

More on dihybrid crossing can be found here:brainly.com/question/1185199

#SPJ1

8 0
2 years ago
What best describes the association between the carbon cycle, plants, and animals.
Morgarella [4.7K]
Plants give off oxygen (that we breathe)and breathe in our carbon dioxide that we exhale
3 0
2 years ago
Which type of preparations should be patted onto the skin rather than rubbed in?
Zigmanuir [339]

Answer: Lotion

The type of preparation that must be patted onto the skin rather than rubbed in is lotion. The reason why it should be patted is to prevent increase circulation and itching. Lotions are water base and for external use only to soothe or protect the skin from dryness.

6 0
3 years ago
A bald eagle and a black bear both have four limbs with digits because they are both tetrapods, descendants of a four-limbed anc
Lisa [10]

The bald eagle and the black bear are tetrapods, which means that they both have four limbs along with the digits. This shows that they both are the descendants of the four-limbed ancestors. However, the limbs of the bear and the bald eagle have different functions. The forelimbs of both these organisms serves different purpose. Hence, their limbs are homologous organs. The homologous organs are those which have the same ancestry but the functions are different.

7 0
3 years ago
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