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Phantasy [73]
3 years ago
15

Inheritance patterns cannot always be explained by Mendels models of inheritance. If a pair of homologous chromosomes fails to s

eparate during meiosis I, select the choice that shows the chromosome number of the four resulting gametes with respect to the normal haploid number (n)?
Biology
1 answer:
valentinak56 [21]3 years ago
6 0

Answer:

n+1; n+1; n-1; n-1

Explanation:

Separation of homologous chromosomes during anaphase I result in a reduction of the chromosome number to half in the daughter cells of meiosis. If two homologous chromosomes of a pair fail to separate from each other, they both will move to the same pole. In this case, one daughter cell of meiosis I will have both the homologous chromosomes of a pair (n+1) while the other one will lack it (n-1). Meiosis II in these two daughter cells will form a total of four cells. Two of the daughter cells will have one extra chromosome (n+1) while the rest two will lack one chromosome from the haploid set (n-1).

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Alternation of generation
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Answer:

The answer to this question is given below in this explanation section.

Explanation:

                    "Alternation of generation"

Alternation of generations is the type of life cycle that occurs in those plant  and algae in the archaeologist and the heterokontophyta that have distinct haploid sexual and diploid asexual stages.In these groups a multicellular haploid gametophyte with n chromosomes alternates with a multicellular diploid sporophyte with 2n chromosomes made up of n pairs.A mature sporophyte produces haploid spores by meiosis a process which reduces the number of chromosomes to half from 2n to n.

Two haploid spores germinate and grow into a haploid gametophyte.At maturity ,the gametophyte produces gametes by mitosis which does not alter the number of chromosomes.Two gametes from different organism of the same species fuse to diploid zygote,which develop into a diploid sporophyte . This cycle from gametophyte to sporophyte in the way in which all land plant and many algae undergo sexual reproduction.

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3 years ago
The diagram below shows an undisturbed rock.
IRISSAK [1]
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3 years ago
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Huntington's disease is caused by an autosomal dominant allele. It is a lethal
Ilia_Sergeevich [38]

The answer would be D. Huntington's disease presents symptoms in humans after many have already reproduced; therefore, they are unaware that they passed on Huntington's disease.

3 0
3 years ago
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trapecia [35]

Answer: (c) It generates ATP, which cells can use to do work.

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Explanation:

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ValentinkaMS [17]

Answer:

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3 years ago
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