In which phase of meiosis 1 do homologues separate?

Explain how DNA AND RNA WORK

lutik1710 [3]

Answer:

Explanation:

DNA are molecules that store genetic information in all organisms.

RNA are molecules that will form proteins based on the instructions coming from DNA.

5 0

2 years ago

The _____ region is the most common area for pressure ulcers to develop.

aleksley [76]

The buttock region is the most common area for pressure ulcers to develop. Pressure ulcers or bedsores are injuries to skin and the underlying tissue resulting from prolonged pressure on the skin, They most often develop on the skin which covers bony areas of the body, such as hips, tailbone and the heals.

8 0

3 years ago

La polidactilia en la especie humana se debe a un alelo dominante. Entre Francisco y Martha, ambos abuelos de Santiago, uno de e

lesya [120]

Answer:

Abuelo/a con polidactilia heterocigoto, Pp
Abuelo/a normal, pp
Juan normal, pp
Esposa de Juan con polidactilia, PP o Pp
Santiago con polidactilia, Pp

Explanation:

Datos disponibles:

Polidactilia es causada por un alelo dominante, P.
El alelo recesivo p produce numero normal de dedos.
Francisco y Martha → Abuelos → uno de ellos con polidactilia
Juan → Hijo → Normal, pp
Santiago → Nieto → Polidactílico

Uno de los padres, ya sea Francisco o Martha, es polidactílico, lo que implica que ésta persona tiene, por lo menos, un allelo dominante en su genotipo, P- (El simbolo "-" esta representando un alelo dominante o uno recesivo).

Si Juan es normal, entonces su genotipo es pp, lo que significa que recibió un alelo recesivo de su padre y otro de su madre. Es decir que el parental policactílico es heterocigota, de forma que pudo heredarle un alelo recesivo a Juan. El otro parental probablemente sea normal, pp, pudiendo solo heredarle a Juan el alelo recesivo.

Entonces, uno de los padres tiene genotipo Pp (heterocigota) y el otro pp (homocigota recesivo).

Juan es norma, pp.

Santiago, hijo de Juan, es polidactílico, lo que implica que lleva en su genotipo por lo menos un alelo dominante, P. Pero Juan solo pudo heredarle un alelo recesivo, p. Por lo tanto, Santiago es heterocigota para la característica, Pp, y heredó el alelo dominante de su madre, que puede ser homcigota dominante PP o heterocigota Pp.

Supongamos que Francisco es polidactílico y Martha normal.

1º Cruza: Francisco x Martha

Parentales) Pp x pp

Gametas) P p p p

F1) 1/2 = 50% Pp

1/2 = 50% pp → Juan

2º Cruza: Juan x Esposa (opción uno: esposa homocigota dominante)

Parentales) pp x PP

Gametas) p p P P

F2) 4/4 = 100% Pp → Santiago

2º Cruza: Juan x Esposa (opción dos: esposa heterocigota)

Parentales) pp x Pp

Gametas) p p P p

F2) 1/2 = 50% Pp → Santiago

1/2 = 50% pp

6 0

2 years ago

What statistical property make odds ratios the ideal measurement for case control studies?

gregori [183]

Odd ratio's insensitivity to variance makes it ideal for case control study measurements.

What are odds ratios?

An indicator of how closely an incident is linked to exposure is the odds ratio (OR). The odds ratio compares two sets of probabilities: the likelihood that an event will occur in a group that has been exposed vs the likelihood that it will not. Odds ratios are frequently employed in case-control study reporting. The odds ratio aids in determining how likely it is for an exposure to cause a particular occurrence. The likelihood that the event will occur with exposure increases with the size of the odds ratio. Probability ratios below one indicates a lower probability of the event occurring given the exposure.

Odd ratio's insensitivity to variance makes it ideal for case control study measurements. It means that it doesn't get affected if variance is increased or decreased.

To learn more about odds ratios, click on the link below –

brainly.com/question/13708570

#SPJ4

7 0

1 year ago

Why is it important that cell growth in a multi- cellular organism be regulated so carefully?

xxTIMURxx [149]

Answer:

It is important that cell growth in a multi-cellular organism be regulated carefully so as to maintain the integrity of the cell cycle

Explanation: Each cell in a multi-cellular organism has it cycle which consist of the inter-phase and the m-phase (active division). Cell growth takes place in the G1 phase of the inter-phase and this ensures that deoxy ribonucleic acid is synthesized in the S-phase in preparation for division.

Hence, adequate cell volume is a key event in order for division to take place. If cell growth is not regulated, it might result in a cell exiting the cell cycle into the resting phase in case of slow growth or result in over-division of a cell in case of over-stimulated growth. The latter is often the case in the development of cancerous cells.

7 0

3 years ago