Answer:
e. Red segregated from brown in meiosis I, and straight segregated from curled in meiosis I.
Explanation:
A cross between two flies heterozygous for both genes produced an offspring with the phenotypic ratio of 9:3:3:1. This ratio is expected according to Mendel's law of independent assortment, which states that alleles of the same gene assort independently during gamete formation.
Before meiosis starts in flies, a single diploid cell duplicates its DNA, so each chromosome has 2 sister chromatids that contain the same information.
- During meiosis I, <u>the homologous chromosomes separate</u> into two daughter cells. The chromosome number is reduced by half, but each chromosome has two sister chromatids.
- During meiosis II, <u>the sister chromatids separate</u> and each daughter cell from meiosis I divides into two new daughter cells (to get the total of 4 haploid cells).
In a heterozygous fly, each homologous chromosome contains a different allele, and the sister chromatids are copies that carry the same allele. For that reason, both traits were segregated during meiosis I.
He did this by experiment with anthrax. Using a microscope, Koch analysed the blood of cows that had failed of anthrax. He marked rod-shaped bacteria and supposed they caused anthrax.
<h3>What does anthrax do to a human?</h3>
Anthrax induces skin, lung, and bowel disease and can be fatal. Anthrax is analysed using bacterial cultures from infected tissues.
There are 04 kinds of anthrax: cutaneous, inhalation, gastrointestinal, and injection.
Anthrax is cured by antibiotics.
Thus, He kept rod-shaped bacteria and supposed they caused anthrax.
To learn more about anthrax click here:
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The characteristics that bryophytes share with algae are biflagellate motile gametes and the life cycle. The life cycle, of course, is the duration of the life of the object. Biflagellate motile gametes are made when two or more of the motile gametes fuse into a zygote.
Answer:
True; all cells in a mature embryo can develop into muscle.
Explanation:
