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Eduardwww [97]
3 years ago
9

The bicoid (bcd) gene in Drosophila melanogaster has a role in establishing the polarity of the insect larva early in developmen

t. When homozygous in the maternal parent, a mutation in bcd has no effect on the parent but causes failure of anterior development in all of the offspring. The developing larvae have two abdomens, lack a head and fail to develop fully to adulthood. Suppose that a female fruit fly that is homozygous for a mutated bicoid gene (bcd-) mated with a wild-type male. What would be the phenotype of the progeny?
Biology
1 answer:
nikklg [1K]3 years ago
7 0

Answer and Explanation:

A maternal impact quality is a quality the incipient organism doesn't express, rather, it is a quality the mother communicates, that by one way or another has an effect on the improvement of the hatchling. Models incorporate qualities that decide extremity of the incipient organism, and qualities that decide the body plan of the developing life, for example, bicoid in Drosophila, which decides head and thorax position.

The bicoid quality figures out which end is the front finish of the fetus. A homozygous transformed bicoid quality outcomes in the absence of foremost fragments, for example, mouth parts, head, and the initial two thoracic portions. It additionally brings about a hatchling creating two back closures (thus the name bicoid).

The phenotype of the hatchlings will be typical, since the mother is ordinary, and it is a maternal impact quality.

The descendants would be transformed as depicted above

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Younger fossils are often morphologically different from older fossils in a lineage. How do paleontologists think the morphologi
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Answer:

Paleontologists thinks that the younger fossils are a species that underwent an-agenesis, gradually evolving a new morphology or/and the younger fossils are a new species that branched off the older one, rapidly evolving a new morphology.

Explanation:

Fossils are the safeguarded remains or hints of creatures, plants, and different life forms from an earlier time. Fossils range in age from 10,000 to 3.48 billion years of age. The perception that specific fossils were related with certain stone layers drove nineteenth century geologists to perceive a land timescale. Like surviving life forms, fossils differ in size from minuscule, similar to single-celled microscopic organisms, to monstrous, similar to dinosaurs and trees.

Fossils give strong proof that living beings from the past are not equivalent to those discovered today; fossils show a movement of advancement. Fossils, alongside the similar life systems of present-day life forms, comprise the morphological, or anatomical, record.

By contrasting the life structures of both present day and terminated species, paleontologists can deduce the ancestries of those species. This methodology is best for life forms that had hard body parts, for example, shells, bones or teeth. The subsequent fossil record recounts the account of the past and shows the development of structure more than a great many years.

8 0
3 years ago
Use the information gathered in the A Three Point Test Cross animation to answer the question. Genes H and K are linked and are
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Answer:

3.5 percent (3.5%)

Explanation:

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Factors that dominantly affect a population comes up especially in size and distribution. These factors include; migration of organisms to other habitats, invasion or colonization by new species, increase or decrease in birth and death rates etc

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Answer:

sorry wish I could help I just don't understand it ??

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