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Gemiola [76]
3 years ago
8

how many gender are really there? I believe that there are two male and female but people say that there are like 50

Biology
1 answer:
Finger [1]3 years ago
8 0
Ehhhhh i think 2 but IM NOT REPUBLICAN
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Both Duchenne muscular dystrophy and color blindness are caused by recessive alleles. DMD, unlike color blindness, nearly always
Ronch [10]

Answer: Although both are X-linked recessive conditions, and therefore more likely in males, with the single X-chromosome. The recessive allele in colour blindness occurs at a higher frequency in the population and is a mild condition. Thus colour blindness does occur to a lesser extent in females because it needs the double recessive condition. DMD is a severe, disabling condition with a limited lifespan, and recessive allele frequency much lower, so the double recessive condition in females is very rare.

Explanation: DMD is an X-linked recessive, “nearly always in males” suggest that it also occurs due to a new mutation or some rare condition e.g. double recessive from an affected father and carrier mother, or inactivation of the normal gene in a heterozygote. It is also found that the defective allele is not completely recessive and that female carriers may exhibit mild to moderate effects.

colour blindness is polygenic, although the genes are all X-linked. It is more common in males than females. Females can carry two recessive alleles and so express the phenotype, but this is uncommon because the frequency of the recessive gene is low.

There are similarities in that both are X-linked recessives, therefore commonly expressed in males, who only have one X chromosome. The gene frequency of the colour blindness recessive is much higher than that of DMD, so the double recessive condition, which affects females, is more likely to be seen with colour blindness. In addition, DMD is a severe condition associated with disability and limited lifespan, which reduces the probability of mating between an affected male and carrier female

6 0
2 years ago
Homologous chromosomes are similar in all of these characteristics except:
Gnesinka [82]

Answer:

Except alleles

Explanation:

Alleles are different versions of the same gene and that's because they have different DNA, even though it is slightly different it can make a lot of changes so that's why they have different alleles.

Allele is actually the variant form of some genes.

The best<u> example </u>for alleles we can find in the gene for blossom color in some species of flowers or plants. Only one single gene is controlling the color and we can see sometimes different versions of it. Those different versions are called Alleles.

7 0
3 years ago
Explain the difference between plasma and the formed elements of the blood.
Pavel [41]

Answer:

Blood plasma:

55% composition of blood contains blood plasma. The plasma contains various proteins and coagulating factors. This mainly include the fluid portion of the blood. Plasma is a straw colored liquid that contains antibodies as well as serum.

Formed elements:

45% composition of blood contains formed element. The formed elements contain RBCs, WBCs and platelets. This mainly include the cells portion of the blood. Formed elements is red color or no color depending on the pigment present in the cells of formed element.

3 0
3 years ago
Can anyone please help with these three questions? Thanks! The first and correct answer will receive brainliest!!! Please please
trapecia [35]
The answers is B please trust me.
8 0
3 years ago
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Determine whether each of the following is a characteristic of the life cycle of a seed plant, a seedless plant, or both. Sporop
kumpel [21]

Sporophyte generation  - It is found in both seed and seedless plant. Dominant phase of the life cycle of the seedless  plants is diploid sporophyte while in seed plant  male and female gametes fuses to produces a diploid zygote which develops into a sporophyte.

Pollination - It occurs in seed plants only

Sporophyte contains male and female reproductive structures -  It is found in both seed and seedless plant.

Single fertilization - It occurs in both seed and seedless plant

Sperm cells transported by water to egg cells - seedless plant only


8 0
3 years ago
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