Final answer:
To tell a spider's gene versions, scientists conduct genotyping, which necessitates collecting a sample of the spider's DNA and analyzing it using techniques such as PCR and genetic sequencing.
Step-by-step explanation:
The question 'how can you tell a spider's gene versions' pertains to determining the specific genetic variations or alleles present within a spider's genome. While this isn't a straightforward task for the average person and often requires specialized equipment, such as that found in a laboratory setting, scientists can analyze a spider's genes through a process called 'genotyping.' This involves collecting a DNA sample from the spider, which can be a challenging procedure in itself, given that spiders can often be small and delicate creatures.
Genotyping is accomplished via various methods, including polymerase chain reaction (PCR) amplification of genes and subsequent sequencing or assessing length polymorphisms or other variations within those amplified gene regions. Interpretation of these genetic markers can help scientists understand the genetic diversity within spider populations, identify species, or even differentiate between individual spiders' genetic characteristics. While this explanation does not delve into the intricate protocols of molecular biology, it provides a general summary of how scientists approach the challenge of determining gene versions in spiders.
Regarding the secondary information provided about spider reproduction, while fascinating, it does not directly pertain to genotyping or identifying gene versions in spiders but rather describes mating behaviors.