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masha68 [24]
2 years ago
8

One of the first Mendelian traits identified in humans was a dominant condition known as brachydactyly. This gene causes an abno

rmal shortening of the fingers or toes (or both). At the time, some researchers thought that the dominant trait would spread until 75 percent of the population would be affected (because the phenotypic ratio of dominant to recessive is 3:1).
Why was this reasoning incorrect?

A. Rare alleles tend to remain rare even when they are dominant so the dominant trait would spread until 25 percent of the population would be affected.
B. The distribution of a gene among individuals is determined by mating and environmental factors, so only a recessive trait can spread until 75 percent of the population would be affected.
C. Rare alleles tend to remain rare even when they are dominant.The distribution of a gene among individuals is determined by mating and environmental factors.
D. The frequency of an allele is determined only by migration, so it is impossible to determine the distribution of desease in human population using Mendelian crosses.
Biology
1 answer:
kvv77 [185]2 years ago
5 0

Answer:

The correct option is C. Rare alleles tend to remain rare even when they are dominant.The distribution of a gene among individuals is determined by mating and environmental factors.

Explanation:

Most people believe that a rare allele would only be recessive. But this is not correct. A rare allele can be dominant. The frequency of an allele to occur in a population will depend on the environmental factors. The alleles which code for traits that are best suitable for living in an environment will be seen in more abundance. The frequency of an allele to occur in a population also depends on the breeding trends of the population.

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The pubic symphysis connects the two hip bones anteriorly and provides a little movement during childbirth. Choose the most appr
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Answer:

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Explanation:

Options for this question are:

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4 0
3 years ago
What is the overall reaction for photosynthesis
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Although photosynthesis is performed differently by different species, the process always begins when energy from light is absorbed by proteins called reaction centresthat contain green chlorophyll pigments. In plants, these proteins are held inside organelles called chloroplasts, which are most abundant in leaf cells, while in bacteria they are embedded in the plasma membrane. In these light-dependent reactions, some energy is used to strip electrons from suitable substances, such as water, producing oxygen gas. The hydrogen freed by the splitting of water is used in the creation of two further compounds that serve as short-term stores of energy, enabling its transfer to drive other reactions: these compounds are reduced nicotinamide adenine dinucleotide phosphate(NADPH) and adenosine triphosphate (ATP), the "energy currency" of cells.

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7 0
2 years ago
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djverab [1.8K]
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8 0
3 years ago
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andre [41]

Answer:

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Explanation:

As shown by the graph, as more time passes, the velocity slowly decreases. This means that as the time goes on, the car is slowing down.

7 0
3 years ago
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