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vitfil [10]
2 years ago
8

Where do changes in an organism’s genes come from?

Biology
1 answer:
emmasim [6.3K]2 years ago
5 0
They come from mutation
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Which chromosomal defect is caused when part of a chromosome breaks off and reattaches backward on the same chromosome?
LiRa [457]

The right answer is inversion.

Inversion is a genetic mutation characterized by the end-to-end reversal of a portion of chromatid on a chromosome.

In other words, it is a double break then it is replaced after rotation of 180 ° of a chromosome segment (backward insertion).

We distinguish :

Paracentric inversions:  The centromere in the chromosome is not included in the inversion.

Pericentric inversions:  The centromere is included in the inversion which transforms a metacentric chromosome into an acrocentric chromosome.

8 0
3 years ago
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What happen if amoeba spis place in sea water
Juli2301 [7.4K]

Answer:

If amoeba specie placed in the sea water, it will die because sea water contains excess of salts which adversely affect the growth of amoeba.

Explanation:

Amoeba is unicellular organisms i. e. made of a single cell. They are eukaryotic organisms i. e. having true nucleus. Amoeba is found in fresh water lakes and hot spring. Amoeba is not able to live in sea water because sea water contains salt which are not good for amoeba.

7 0
3 years ago
6. Why does meiosis increase genetic variation in the offspring, but mitosis does not? (1 point)
brilliants [131]
Meiosis involves crossing over where chromosomes exchange genetic segments, resulting in different sets of chromosomes. Each time an egg or sperm created, it is different due to this recombination. Mitosis on the other hand is non-sex cells replicating exact copies of themselves which lead to no genetic variation as they aren't involved in producing offspring.
3 0
2 years ago
What type of deafness is present if the bone-conducted sound is heard longer than the air-conducted sound?
NNADVOKAT [17]
The type of deafness that is present if the bone conducted sound is heard longer than the air conducted sound is CONDUCTIVE HEARING LOSS.
Conductive hearing loss refers to the situation where there is a problem conducting sound waves anywhere along the route through the outer ear to the ear drum and the tiny bones of the middle ear.
4 0
3 years ago
The Earth’s core is made of an alloy of
OlgaM077 [116]
It would be A. Iron & Nickel.
Hope it helps you!:)
3 0
3 years ago
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