Entrance Exams
Govt. Exams
Cross: Ff × FF produces FF and Ff offspring. All are phenotypically normal. Probability of affected (ff) child = 0%
Anagenesis refers to phyletic evolution or linear evolution where one species gradually transforms into another without branching.
All offspring being tall when crossed with dwarf (tt) indicates the tall parent is TT. If it were Tt, approximately half offspring would be dwarf.
If q = 0.3, then p = 0.7. Heterozygous frequency = 2pq = 2(0.7)(0.3) = 0.42
According to Hardy-Weinberg principle, total allele frequencies must equal 1. Therefore, 1 - (0.4 + 0.3 + 0.2) = 0.1
Embryological similarities, such as gill slits in vertebrate embryos, demonstrate common evolutionary ancestry among different species.
Type AB blood group is codominant, expressed as IAIB, where both IA and IB alleles are expressed equally.
1:2:1 ratio indicates Aa × Aa, where offspring are 1 AA : 2 Aa : 1 aa. This is the typical F2 ratio for a monohybrid cross.
Most mutations are either neutral or harmful; only rarely are they beneficial. This is a key principle in evolutionary biology.
White-eyed female (XwXw) × red-eyed male (XWY). F1 females receive Xw from mother and XW from father, making them XWXw (red-eyed carriers).