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Simora [160]
3 years ago
8

Explain how XY mice with a duplication of chromosome 1 develop ovaries and a female phenotype.

Biology
1 answer:
Dahasolnce [82]3 years ago
3 0

Answer:

Duplication of the Dax1 is associated to equivocal sex determination on how XY mice develop ovaries and a female phenotype which comes from strong expression of the homologous gene (Ahch) in the first stages of gonadal (and adrenal) differentiation.

Explanation:

Dose-Sensitive Sex Reversal Locus on Chromosome X, Gene 1 , DAX1∗ (officially, nuclear receptor subfamily 0, group B, member 1; NR0B1) is a member of the nuclear hormone receptor superfamily of transcription factors that functions primarily as a transcriptional repressor.

Duplication of the DAX1/NROB1 locus is associated with male-to-female sex reversal, that is ambiguous external genital differentiation ranges.

One X chromosome and one Y chromosome in each diploid cell of their bodies differencite males from females, who typically have two X chromosomes but XX males that are SRY-positive have two X chromosomes, with one of them containing genetic material from the Y chromosome, making them phenotypically male but genetically female.

DAX1 protein may be directly or indirectly involved in gonadal regulation of hypothalamic-pituitary function.

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Therefore, considering endosymbiotic origin theory, Both Mitochondria and chloroplast have similar DNA is not a piece of evidence.

Learn more about endosymbiotic origins theory here

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How do paleontologist use known evidence to make their observations? What are 2 of their observations
Ivahew [28]

Answer:

Explanation:

Paleontologists are scientists that use fossil records to study the history of life on earth. They use known evidence/fossils such as bones, prints (on land or sea), dead remains to determine evidence and history of past life on earth.

Some of there observations include the use of comparative anatomy to determine possible evolution. They also use carbon dating to determine approximately how long a fossil/bone has been in existence.

4 0
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ser-zykov [4K]

Answer:

Due to the law of independent assortment

Explanation:

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