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tatuchka [14]
3 years ago
10

Help meeeeeeeeeeeeeeeee

Biology
2 answers:
marin [14]3 years ago
4 0
I think the answer is b
lyudmila [28]3 years ago
4 0

Answer:

I'm pretty sure the answer is B.

Explanation:

Please, correct me if I'm wrong. :)

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A pair of mice are bred several times generating the following data table. What are the most likely genotypes of the parents?
Tamiku [17]

Answer:

This question lacks options, the options are:

A) FF and ff

B) FF and Ff

C) Ff and Ff

D) Ff and ff

The answer is D (Ff and ff for parent 1 and 2 respectively)

Explanation:

This question depicts a single gene coding for fur colour in mice. The gene controls two traits, black fur and white fur, encoded by alleles F and f respectively.

According to the question, a pair of mice has been bred several times to generate the same data of 22 black fur and 23 white fur mice. Based on this data, it shows that the phenotypic ratio of black to white mice is 1:1.

To get a 1:1 phenotypic ratio of black fur offspring to white fur offspring, the parents mice must have genotypes Ff (heterozygous) and ff (same recessive alleles).

In a cross between parents Ff × ff (see punnet square), offsprings with the following genotypes will be produced: Ff, Ff, ff and ff. Ff is black furred while ff is white furred.

Ff (2) : ff (2) is equivalent to Ff (1) : ff (1).

Hence, a data of 22 black mice and 23 white mice which represents a 1:1 ratio will only be produced by parents mice with genotypes: Ff and ff.

3 0
4 years ago
Gracias al transporte activo
Effectus [21]

Answer:

C. podemos afirmar que la membrana posee permeabilidad selectiva

Explanation:

Sana nakatulong

8 0
3 years ago
4. Lily is studying the core of Earth. Which sphere is she examining?
erastovalidia [21]
Lithosphere is the anwser
5 0
3 years ago
Read 2 more answers
Reproductive isolating mechanisms are divided into categories based on when they act. _____ isolating factors prevent fertilizat
Cerrena [4.2K]

Answer: (B) Pre-zygotic; post-zygotic.

Explanation:

Prezygotic isolation occurs before fertilization of eggs. It occurs between the two sex gametes and deter sexual reproduction between different species.

However, individuals are considered to be diverge on the phylogeny tree and different species, when they cannot reproduce.

Mechanisms of prezygotic isolation include habitat isolation, gamete isolation, mechanical isolation, behavioral isolation, and mating seasons.

Whereas, postzygotic isolation prevents the formation of fertile offspring. This phenomenon leads to production of an hybrid offspring from different species and this is a form of speciation in nature.

Mechanisms of postzygotic isolation include hybrid inviability, hybrid breakdown, and hybrid sterility.

6 0
4 years ago
Please help i am marking BRAINLIEST because I REALLY NEED HELP
kondaur [170]

Answer and Explanation:

Abiotic factors are those that are nonliving, while biotic factors are those that are living.

Abiotic factors in a classroom:

- chairs

- tables

- blackboard

Biotic factors:

- class pet

- plant in the classroom

Hope this helps!

4 0
3 years ago
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