Biology, 01.06.2021 02:50 alizeleach0123

Consider the results of a testcross performed on an organism heterozygous for 2 genes. For each scenario of gene arrangement for the two genes, write the percentage of nonrecombinant and recombinant progeny that will result from the testcross. Gene arrangement of 2 genes % Nonrecombinant progeny % Recombinant progeny
Unlinked (independently assorting)
Completely linked genes (with no crossing over)
Linked genes (with some crossing over)

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Answer from: kekejones6321

Following are the answer to the given points:

Explanation:

Unlinked - Nonrecombinant progeny (50%), recombinant progeny (50%)Fully related genetics - 100% non-recombining genetic progeny (parental)Incomplete connection of genes > 50% non-recombinant progeny < 50% crossover offspring. Connected genes

Mendel had established some essential concepts concerning inherited mechanisms such as the patterns of transmission of genes to offspring depending on their chromosomal placements. This same notion of linkage was offered to describe the pattern of the legacy of alleles on its chromosomal position.

Two different chromosomes have specific isoforms – for example, A and B which have two different features. As just a result, 50 percent of gametes are parental throughout type AB, and the other 50 percent of a recombinant in zygotes are quasi (aB & Ab) and 50 percent of the progenies that outcome from this mixture of gametes, therefore, are nonrecombinant in 50% and the cloned in 50 percent of the genetic makeup AaBb.

With two fully linked genes, e.g they exist on the very same chromosome and no cross-over occurs, all gametes are similar to parent types (AB and ab), like they do not split themself nor are diverse and culturally produced (nonrecombinants).

Answer from: Quest

relative dating involves things like higher layers are most recent than rocks lower in the sequence. this can be extended to the known sequence of fossils. rocks containing rabbit fossils are later than those containing dinosaur fossils.

absolute dating methods mainly use radioactive elements that have known rates of decay and produce recognizable products. for example potassium 40 decays to produce argon. once a rock has solidified the argon is trapped. by measuring the argon and potassium0 you can get an accurate number for the age.

some other methods are good for archaeological ages. dendrochronology involves recognizing the sequence of tree rings. the orientation of magnetized particles in baked clay can be used to date a fire.

hope this .. .

Answer from: Quest

a tetrad is the foursome during meiosis made by two homologous chromosomes that have each already replicated into a pair of sister chromatids.

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Consider the results of a testcross performed on an organism heterozygous for 2 genes. For each scen...

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