In a species of fish, a black spot on the dorsal fin is observed in males and females. a fish breeder carries out a pair of reciprocal crosses and observes the following results. cross i parents: black-spot male × nonspotted female progeny: 22 black-spot males 24 black-spot females 25 nonspotted males 21 nonspotted females cross ii parents: nonspotted male × black-spot female progeny: 45 black-spot males 53 nonspotted females

Areal dna molecule consists of thousands of these pairs of nucleotides. what is the pairing arrangement of the nitrogen bases

Punnett squares are used to show possible combinations of alleles or to predict the probability of a trait occurring in offspring. an incomplete dominance cross is performed between a bird that is homozygous for red feathers and a bird that is homozygous for blue feathers. purple offspring result. then, two of the purple offspring are crossed. according to the punnett square for this cross, how many of the offspring from the second cross will have a feather color that results from incomplete dominance? 1 in 4 2 in 4 3 in 4 4 in 4

Which of the following types of stars are dim but can have high surface temperatures? giants main sequence stars supergiants dwarfs