AP Biology· difficulty 1/5
What is the genotype of the unknown parent?
tt (homozygous recessive)
Cannot be determined
Tt (heterozygous)
TT (homozygous dominant)
Explanation
A 1:1 ratio in a test cross indicates the unknown parent must be heterozygous (Tt). A homozygous dominant parent would yield only tall offspring.
Want 10 more like this — adaptive to your weak spots?
A dihybrid cross is expected to give a 9:3:3:1 ratio. Out of 160 offspring, observed counts are 99, 28, 25, 8. The chi-square statistic for goodness of fit (df …
chevron_rightThe cytological basis of Mendel's law of segregation is…
chevron_rightAn individual with two identical alleles for a gene is…
chevron_right