Biology Questions and Answers April 30, 2019

If you are provided with a stock of pure-breeding (i.e., homozygous) wild flies and another stock of pure-breeding Bar flies, how could you determine if the Bar allele is sex-linked or autosomal, dominant or recessive? In other words, outline the genetic crosses you would perform (which flies would you mate together), whereby the offspring of said

Suppose a geneticist uses a three-point testcross to map three recessive, linked hummingbird wing- snape mutations called tk. f. and b. where tk is associated with thick wings; f is associate with fiat wings; and b is associated with blunt wings. He ?rst crosses homozygous blunt birds to homozygous thick, fiat birds. Next, he backcrosses the F1

Phenotype blunt thick, flat flat thick, blunt thick flat, blunt thick, flat, blunt wild type Number 801 801 177 169 7 8 24 27 Recombinant type SCO SCO SCO parental DCO

On the following map, identify these paths of the slave trade: British Caribbean; British Colonial America; Brazil; Danish Caribbean; Dutch Caribbean; French Caribbean; Spanish America. Draw the appropriate labels to their respective targets.

British Colonial America 100000 Dutch Caribbean NORTH AMERICA Danish Caribbean Caribbean Sea SOUTH AMERICA AFRICAN SLAVE TRADE IN THE AMERICAS (14511870) Source areas Plantation America Total slaves traded British Caribbean ATLANTIC OCEAN Brazil EUROPE ATLANTIC OCEAN SENEGAMBIA SIERRA LEONE Spanish America AFRICA GOLD COAST BIGHT OF BENIN BIGHT OF