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pshichka [43]
3 years ago
13

In a duplication, a person has more than two alleles for a certain trait. crossing-over between sister chromatids has occurred t

wice a particular segment is missing on one chromosome. a chromosomal segment is turned 180 degrees. chromosomal segments are exchanged between two nonhomologous chromosomes. 4 points save answer
Biology
1 answer:
Leni [432]3 years ago
5 0

The right answer is a person has more than two alleles for a certain trait.

Duplication is a genetic mutation characterized by the doubling of genetic material on a chromosome. There are several mechanisms that result in the duplication of either a large chromosomal portion, a gene, or a nucleotide sequence.

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Arrange the events in the life cycle of mosses in the flowchart below. Start the life cycle with the mature sporophyte stage in
labwork [276]

Answer:

Life cycle of a moss

Explanation:

LIFE CYCLE OF A MOSS FROM MATURED SPOROPHYTE STAGE

An embryo further develops into a pear-shaped  sporangium, which is the *sporophyte  stage of the plant*. The sporangium  contains spore sacs, each of which is the spore mother cell that undergoes meiotic division  to form four spores,The spores are released and germination

takes  place giving  rise to a protonema, which develops into a new gametophyte plant. The gametophyte  generation or haploid phase of the moss is from the production  of haploid spores after meiosis  to the period just before fusion of the haploid antherizoid or haploid ovum. The sporophyte generation or diploid  phase is from the diploid  mother cells just before meiosis.

Examples of moss plants include Funaria hygrometrica, Polytrichum commune, Barbuda Indica.

8 0
3 years ago
Why is the shape of a protein so important?
shutvik [7]

Answer:

It Determines whether the protein can interact with other molecules

Explanation: Hope this Helps

4 0
2 years ago
Identify the organelles in the cell.
Svetach [21]

Answer:

Following are the organelles present in the cell.

nucleus

mitochondria

ribosomes

lysosomes

endoplasmic reticulum

vacuole

Golgi bodies

Explanation:

Nucleus is the central part of the cell which control all activities in the cell. Mitochondria is also called power house of the cell which is responsible for the production of energy for the cell. Ribosomes and endoplasmic reticulum  are responsible for the production of proteins. Lysosomes collects and removes the waste material from the cell. Vacuole store nutrients and food materials for the cell while golgi bodies modifies  the protein.

8 0
3 years ago
Read 2 more answers
What type of nervous system do mollusks have
Mnenie [13.5K]
They have two pairs of main nerve cords organized around a number of paired ganglia. while they don't have a "true brain"-- they have somewhat of a nervous system, composed of the two, or three pairs of nerve cords contained in the visceral mass.
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3 years ago
The movement of perfume from a vial until it randomly disperses throughout the room is an example of
USPshnik [31]
This movement is called diffusion 
5 0
3 years ago
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