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Fofino [41]
2 years ago
14

La reproducción sexual y la deriva genética​

Biology
1 answer:
eimsori [14]2 years ago
6 0
En la reproducción sexual, los descendientes son distintos entre ellos y a sus progenitores. No se produce ninguna nueva variedad genética, pero sí nuevos genotipos (combinaciones de genes). Durante la meiosis se producen gametos, células sexuales con la mitad de cromosomas que las células somáticas.
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What factors are contributing to the oceans changing ph ?
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3 years ago
Fish hatchery workers know that if they want artificially spawned salmon to return to a specific stream to spawn when they reach
notsponge [240]

Answer:

c. imprinting  

Explanation:

Imprinting is the object of study of ethology, which is related to animal behavior. In the early stage of an animal's life, imprinting is an essential and most conducive phase for learning and subsequent development. The two main types of imprinting are sexual and filial.  In sexual imprinting, a young animal learns the traits it seeks in a mate. Affiliate imprinting is the learning of a offspring from his / her parent.

In the case of the salmon fish situation, the need for workers to raise fingerlings (salmon) in stream water during a certain critical period in their early development is an example of imprinting. In this case, imprinting is necessary for the development of this animal in a different environment from the one it was raised.

3 0
2 years ago
What does the term strain mean as it is used in genetic crosses
LUCKY_DIMON [66]

In biology, the strain is a low-level taxonomic rank used in different contexts:

In microbiology, a strain is a part of a bacterial species different from other bacteria of the same species by a minor but identifiable difference. Strains are often created in the laboratory by mutagenesis existing strains or wild-type examples of bacterial species.

In zoology, a strain corresponds to an individual or group of individuals who are at the origin of a line of descendants, sometimes called the holotype, paratypes, etc. A strain is a population of organisms that descends from a single organism or pure isolate culture. Strains of the same species may differ slightly from each other in many respects.

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5 0
3 years ago
Who know what is the end product of replication
marin [14]
End product of replication is the same to which you have replicate.....but they get increased in quantity.......
6 0
3 years ago
Read 2 more answers
Different ratios occur in crosses with single gene pairs or two gene pairs. What types of ratios are likely to occur in crosses
likoan [24]

Answer:

Genotype ratio: 1, 1:1, 1:2:1

Phenotype ratio: 1, 3:1

Explanation:

Single gene pair cross is also known as monohybrid cross. This means that only one gene usually with two alleles is observed and it express one trait.

For example, if we name the gene for a certain trait with A, the possible genotypes are AA (dominant homozygous), aa (recessive homozygous) and Aa (heterozygous). Possible crosses are:

P: AA  x  AA

F1 : all of them are AA

The same is with aa x aa (all of the offspring are with aa genotype)

P: AA  x  Aa

F1: AA Aa AA Aa  (genotype ratio 1:1) (phenotype ratio 3:1)

The same genotype ratio is  in aa x Aa (offspring will have aa Aa aa Aa-(genotype ratio 1:1) (phenotype ratio 1:1)

P: Aa x Aa

F1: AA Aa Aa aa (genotype ratio 1:2:1) (phenotype ratio 3:1)

P: AA x aa

F1: Aa Aa Aa Aa (1)

5 0
3 years ago
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