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shtirl [24]
3 years ago
14

How does a substance cross the cell membrane in diffusion?

Biology
1 answer:
ryzh [129]3 years ago
6 0

Answer:

A

Explanation:

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After crossing over as shown below what would the sequence of genes be for each of the chromatids
SashulF [63]

The sequence of the genes will be ABCD, abCD and abCd, abcD.

Full question is attatched below.

<h3><u>Explanation:</u></h3>

The genes in the chromosomes are denoted as the sequence of genes present in a single chromatid of a particular chromosome. Thus, the genes here in this question are to be mentioned as ABCD and not as abab.

Crossing over is the process by which the homologous pair of chromosomes do pair up in the Prophase 1 of meiosis 1 division and they exchange a particular part of their DNA with each other. This leads to exchange of genes between the homologous chromosomes, which will form different gametes in near future. This brings about a variation between the offsprings of same individuals.

Here the d gene of the two chromosomes are getting exchanged.

So the chromosomes will become ABCD, abCD and abCd, abcD respectively.

8 0
3 years ago
Sets the metabolic rate for the cells of the body describes
Kazeer [188]

Answer:

BMR ;  Basal Metabolic Rate

Explanation:

MR is  the rate of energy expenditure per unit time by endothermic animals at rest....

Metabolic comprises the process that the body needs to function.

Basal metabolic rate is the amount of energy per unit of timethat a person  needs to keep the body functioning at rest

3 0
3 years ago
What is the type of chemical weathering caused by oxygen in the atmosphere called
Zinaida [17]

Answer:

Oxidation

Explanation:

Oxidation. Oxygen causes oxidation. You can think about oxidation like rust on a car. Rust forms when the iron or steel in your car reacts with the oxygen in the air to form iron oxide.

5 0
3 years ago
Why choose that gene for PCR in the bacterial identification lab?
Reika [66]

Answer:

Background

During the course of a bacterial infection, the rapid identification of the causative agent(s) is necessary for the determination of effective treatment options. We have developed a method based on a modified broad-range PCR and an oligonucleotide microarray for the simultaneous detection and identification of 12 bacterial pathogens at the species level. The broad-range PCR primer mixture was designed using conserved regions of the bacterial topoisomerase genes gyrB and parE. The primer design allowed the use of a novel DNA amplification method, which produced labeled, single-stranded DNA suitable for microarray hybridization. The probes on the microarray were designed from the alignments of species- or genus-specific variable regions of the gyrB and parE genes flanked by the primers. We included mecA-specific primers and probes in the same assay to indicate the presence of methicillin resistance in the bacterial species. The feasibility of this assay in routine diagnostic testing was evaluated using 146 blood culture positive and 40 blood culture negative samples.

Explanation:

Results

Comparison of our results with those of a conventional culture-based method revealed a sensitivity of 96% (initial sensitivity of 82%) and specificity of 98%. Furthermore, only one cross-reaction was observed upon investigating 102 culture isolates from 70 untargeted bacteria. The total assay time was only three hours, including the time required for the DNA extraction, PCR and microarray steps in sequence.

3 0
3 years ago
How much does a blue whale weigh?
OlgaM077 [116]
Well, it depends but adults can weigh up to 420,000 pounds

5 0
3 years ago
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