Genetics Answers

If two genes are 50cM apart, are they linked or unlinked? Give brief reason for your answer.

Black fur (B) is dominant to white fur (b) in guinea pigs. An F1 cross was conducted and resulted in 100% heterozygous guinea pigs (Bb). What is the genotypic ratio outcome of the F2 generation which would cross two heterozygotes?

A pure - breeding black pig is crossed with a pure - breeding white prg & work out the genoty pic & Phenoty psc raciso of fland fy of spring, if gene for block coat as domination

How does paternity testing help with identifying linkage to genetic diseases that can have an impact on their long term health.

This is a genetics’ question relating to biology and we are required to create a pedigree for the question.

Here is the link to the question, please upload a clear and accessible image of solutions: https://drive.google.com/file/d/1W_k5DidC42fR48D-UQEzkU2xK-UVNsJS/view?usp=drivesdk

In a pea plant that breeds true for tall, what possible gametes can be produced? Use the symbol D for tall, d for dwarf.

Should GMO (genetically modified) foods be labelled so that consumers know that they are buying them?

Does it matter what species of plants/crops are being used for genetic modification of foods? In other words, should GMO foods be allowed only for certain species?

In peas, a gene for tall plants (T) is dominant over its allele for short plants (t). The gene for smooth peas (S) is dominant over its allele for wrinkled peas (s). The genes are not linked.

TtSs x TtSs

ttSs x Ttss 

TtsSS x ttss

Ttss x ttss

In peas, a gene for tall plants (T) is dominant over its allele for short plants (t). The gene for smooth peas (S) is dominant over its allele for wrinkled peas (s). The genes are not linked. Determine both phenotypic and genotypic ratios for the results of each of the following crosses: