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mario62 [17]
2 years ago
5

After consulting a genetic map of Drosophila melanogaster, you find that two genes you are interested in lie 72 map units apart.

If you do a 2-point testcross for these two genes, what percentage of the progeny do you expect to be recombinant?
Biology
1 answer:
IrinaK [193]2 years ago
6 0

Answer:

The percentage of recombination frequency will be greater than or equal to 50%.

Explanation:

A distance of 72 map units is a substantial distance so two genes located this much distance apart will segregate almost independently or we can say that they will be considered as unlinked genes that is why the recombination frequency will be greater than or equal to 50%. Recombination frequency in turn gives us an idea of how many progeny are produced with genes which underwent crossing over during meiosis in parental gametes so that they have new combinations of genes which are different than parents leading to variations. In short in this example, 50% or more progeny will be recombinants.

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C. Only bacteria can reproduce outside a host.

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If our visual perception depends only on the feature detectors in the visual cortex, what would we see?
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The sophistication of the visual cortex can be simplified through understanding that the neurons found in this region are distinguished by the kind of stimulus that each detects.

There are three major groups of feature detectors in visual cortex. These includes simple cells, complex cells and hypercomplex cells. The simple cells are the most specific since it responds to the geometric characteristics of the stimulus such as the lines of particular width, orientation, angle and position within the visual field. The complex cells are similar to simple cells. What differentiates one from the other is that they respond to the proper stimulus in any position within the receptive visual field. In addition, some of the complex cells respond to particular lines or edges moving in a specific direction opposite the receptive field. Lastly, the hypercomplex cells are responsive to the specific length of the lines. It is believed that the information from all feature detectors conjoin in to result in the visual stimulation perception.

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3 years ago
A forensic odontologist examines the teeth of a skull and finds no baby teeth, no wisdom teeth, scarring in the rear jawbone, no
denis23 [38]
The correct answer is letter B, the age range of the skull is less than 10 years old. Teeth are also a form of bone that develop within the skull. Its structure helps archaeologists determine the age of fossils that they dug up from the soil. Children lack some prominent features compared to adults because their bodies are still growing and developing into maturity. 
4 0
2 years ago
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An _____ is a scientist who might study of bones found in an old grave.
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2 years ago
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Correctly match the following: - fibrous joint between radius and ulna - fibrous joint that unites bones of the skull - articula
topjm [15]

Answer:

- fibrous joint between radius and ulna: C. syndesmosis

- fibrous joint that unites bones of the skull: H. suture

- articulation between teeth and bone: J. gomphosis

- joint with a cavity between bones: E. synovial

- the epiphyseal plate: F. synchondrosis

- articulation between two pubic bones: A. symphysis

- permits opposition and reposition:  B. saddle  

- fibrocartilagenous fluid filled sacs outside the joint cavity: G. meniscus

- most common degenerative joint disease: D. osteoarthritis    

- movement of the sole laterally:  I. eversion  

Explanation:

The syndesmosis can be defined as a fibrous joint held together by ligaments. Sutures are fibrous joints of tissue that link the cranial bones of the skull. A gomphosis is a mobile fibrous that binds the teeth into sockets in the mandible and maxilla. Synovial joints are joints found between bones that move against each other (e.g., shoulder bones). They (synovial joints) are the most common class of joints found in the body. A symphysis is a cartilaginous, slightly movable, joint between two bones. A saddle is a synovial joint whose opposing surfaces are concave and convex, respectively. Osteoarthritis is the most common type of arthritis, this condition occurs when the protective cartilage surrounding the bones wears away over time. Finally, eversion refers to a type of movement of the foot which occurs in the auctioneering joint.

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