10 Tetras are popular tropical fish to raise and breed as a

Last updated: 3/10/2023

10 Tetras are popular tropical fish to raise and breed as a hobby A tetra breeder has a set of dihyb females that have blue eyes and long tail fins She uses these to do a testcross to males that are homozygous for the recessive alleles for black eyes b b and short tail fins tt The following numbers of each type were born 321 with blue eyes and short tail fins 44 with blue eyes and long tail fins 376 with black eyes and long tail fins and 52 with black eyes and short tail fins From these data the breeder can deduce that in the dihybrid parent the alleles are a linked in Cis b linked in Trans c not linked 11 The lengths of chromosomes differ from one species to another In one the longest chromosome is 294 map units long while the shortest is 102 map units in length a True b False This means that alleles at the tips of each chromosome in this species essentially show independent assortment