Evolutionary Biology Lecture 15

<p>Male sterile introgressions. (B)</p> Signup and view all the answers

<p>They promote increased reproductive isolation. (B)</p> Signup and view all the answers

<p>The offspring will imprint on the distinct male song. (B)</p> Signup and view all the answers

<p>It can preserve distinct species even with gene flow. (D)</p> Signup and view all the answers

<p>They can reveal locations of genes that are incompatible in hybrids. (D)</p> Signup and view all the answers

<p>The prevalence of speciation with gene flow is uncertain. (D)</p> Signup and view all the answers

<p>Selective introgression of advantageous traits. (C)</p> Signup and view all the answers

<p>The process of offspring learning specific songs from other species. (D)</p> Signup and view all the answers

<p>Hybridization can sometimes result in stable populations despite gene flow. (B)</p> Signup and view all the answers

<p>Gene flow among populations aids in the emergence of new species. (A)</p> Signup and view all the answers

<p>Hybridization leading to polyploidization (B)</p> Signup and view all the answers

<p>Passerine birds (C)</p> Signup and view all the answers

<p>Production of sterile offspring (C)</p> Signup and view all the answers

<p>Disproportionate impact of the X chromosome on male hybrid sterility (A)</p> Signup and view all the answers

<p>Selfing or vegetative propagation (A)</p> Signup and view all the answers

<p>Horseshoe crabs (C)</p> Signup and view all the answers

<p>Allopolyploidy (A)</p> Signup and view all the answers

<p>It was formed through hybridization of diploid species. (B)</p> Signup and view all the answers

A rule in genetics stating that, in interspecies hybrids, the sex most often affected by sterility is the heterogametic sex (e.g., male in mammals and flies).

Genes like Ods, Hmr, Nup96, and Nup160 are involved in reproductive isolation between different Drosophila species, potentially through adaptive protein evolution.

Sterility in male offspring resulting from mating between different species.

Changes in protein structure and function in response to selective pressures, helping species adapt and reproduce.

A form of meiotic drive in which the sex chromosome segregation is biased, leading to uneven sex ratios in the offspring.

The time it takes for a species to evolve can vary greatly depending on the organism and evolutionary pressures.

Lake Malawi cichlids can speciate in about 10,000 years.

Plant species can form rapidly through hybridization, creating a new, more stable species.

A new species formed from the hybridization of two different species leading to a tetraploid descendant.

Offspring from hybridization of two species may be infertile.

The X chromosome strongly influences male hybrid sterility in Drosophila.

The hybridization of certain Drosophila species can show a strong effect on male fertility related to the x chromosome.

The process of incorporating genetic material of one species into the genome of another, as observed in Drosophila mauritiana.

A male finch from one species migrated to another, mated with a different species, and their offspring imprinted on the new species' song, leading to inbreeding.

Some sunflower species might have originated from hybridization.

The transfer of genetic material between species, often through hybridization.

Strong natural selection can maintain separate species even with limited gene flow.

Areas where species meet and hybridize, offering clues about genetic incompatibilities

Genes that don't move between species, suggesting barriers to genetic mixing among closely related species.

Sometimes, a beneficial gene variant can spread between species via hybridization.

The idea that speciation can occur even with some genetic exchange between species.