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aliina [53]
3 years ago
8

Contrast the genetic content and the origin of sister versus nonsister chromatids during their earliest appearance in prophase I

of meiosis. How might the genetic content of these change by the time tetrads have aligned at the equatorial plate during metaphase I?
Biology
1 answer:
Bogdan [553]3 years ago
7 0

Answer:

<u>Sister chromatids are identical  forms of chromatids  of a chromosomes. They are mostly  formed by semi-conservative replication of DNA molecule of a single  chromosome.Thus they  are  like  </u><u>'photocopies' </u><u> of  original parent  chromosomes; joined together at the Centromere</u>.

They are exactly similar in all ramification; with the same gene and allele compositions..

<u>However; slight differences  arise between the two identical sisters due to  </u><u>mutation</u><u> from</u><u> errors </u><u>at replication;and also in  the  length of telomere repeats.</u>

Non-sister chromatids are dissimilar forms of  chromatids of a chromosomes formed  when each half of  a chromosome  at fertilisation from separate   haploid sex-cells, of each parent. fused.They contain different genetic composition;because  they are not on the same homologous chromosomes.Therefore crossing -over ensure variation.

<u>However, they are genetically  similar in composition; if they  are contained in homologous chromosomes</u>. This is because Synapsis of bivalent of these chromosomes allow genetic material to be shared by  chromosomal crossing-over between the non-sister chromatids  on the chromosomes ; therefore identical genetic characteristics are shared .

Explanation:

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Some geneticists study the genes that control bone development to try to understand bone growth and find cures for diseases. How
AnnZ [28]

Options:

a) the geneticist looks at the symptoms of a disease, and the orthopedist does not.

b) the geneticist works in a hospital, and the orthopedist works in a lab.

c) the geneticist focuses on what causes the disease, and the orthopedist treats the disease.

d) the geneticist deals with patients, and the orthopedist does not.

Answer:

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<h3>What is chromosomes?</h3>

A chromosome is a lengthy DNA molecule that contains all or a portion of an organism's genetic code. Histones, which serve as packing proteins for the majority of eukaryotic chromosomes, work with chaperone proteins to attach to and condense the DNA molecule in order to preserve the integrity of the molecule.

A medical geneticist specializes in using DNA tests and genetic data to identify, manage, or prevent chromosome problems, inherited genetic illnesses, and other genetically driven diseases and ailments.

Orthopedic physicians, often known as orthopedic surgeons, concentrate on assisting you with musculoskeletal problems. They are responsible for identifying and managing diseases that impact your musculoskeletal system.

For more information regarding chromosomes, visit:

brainly.com/question/11912112

#SPJ1

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