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emmasim [6.3K]
3 years ago
10

An organism has 3 pairs of chromosomes. How many different combinations of chromosomes are possible as a result of meiosis if cr

ossing over or chromosomal mutations do not occur?
Biology
1 answer:
baherus [9]3 years ago
8 0

Answer:

2^3= 8 possible combinations

Explanation:

Mendel discovered in his experiments that a pair of chromosome in an organism consists of two similar but non-identical chromosomes called HOMOLOGOUS CHROMOSOMES in which each comes from each parent.

During meiosis, each homologous chromosomes get sorted into gametes in accordance to Mendel's law of segregation and independent assortment.

For each chromosome, a variant form of gene called allele is gets randomly sorted into gametes to form 8 possible combinations for an organism with three (3) pair of chromosomes.

Possible number of combination of gametes is determined by the formula 2^n, where n is the number of character or chromosome pair in this case.

Hence 2^3= 8 possible chromosomal combinations of gametes produced by meiosis.

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What type of unhealthful air population occurs when ozone near the ground mixes with other polluting gases?
klemol [59]

I believe the answer is smog

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How do adaptations help Ann organism to reduce competition for food and other resourses
Gre4nikov [31]
An organism adapting to its environment leads it to be more ‘equipped’ for survival.
Competition is when other species fight for the same resources that another species needs. Also, it would produce offspring with these adaptations.

An example (to help you better understand);

A blue jay has great eyesight, strong wings, and sharp beak. (Better adapted organism) Another blue jay has great eyesight, weak wings, and dull beak. (The competitor/unadapted)

Both birds find the same food source and are now competing for it. The first bird has sharp beams, which is better for breaking, and ‘chomping’ the seeds/food. The second bird would struggle to consume its food (seed) unless it’s worms.

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And i hope this helped show how competition can be reduced.
5 0
3 years ago
What is not a feature of rbc morphology?
kotegsom [21]

The given question is incomplete as options are not provided, however the options are as follows:

A. a large surface area-to-volume ratio

B. ability to form stacks known as rouleaux

C. a convex shape allowing for more efficient transport of oxygen

D. ability to bend and flex when entering capillaries

Answer:

The correct answer is - option C.

Explanation:

RBC cells are biconcave in the shape it is form shape of dub bell in general. These cells are small, round. The biconcave shape of the blood cells helps in the flow of the blood easily and these cells have no nucleus like other cells to have high amount of hemoglobin that is a pigment that carry oxygen and other gases for easy gaseous exchange.

Due to their flexible biconcave shape they can bend and flex accordingly during entering capillaries. The shape of the RBC helps in making stacks and large surface to area ratio.

Thus, the correct answer is - option C.

8 0
3 years ago
3.
Alex73 [517]

Answer:

b

Explanation:

because the answer is obvious

7 0
3 years ago
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