In cats, the Manx (M) allele causes a short or absent tail, while a recessive allele (m) confers a normal, long tail. Cats of genotype MM are never born alive, as the M allele is fatal before birth when homozygous, because the spinal cord never develops. If 2 Manx cats mate, what proportion of living offspring will have long tails?

Which statement correctly describes other ways in which nebulae and stars are different? a. a star always has a higher density than a nebula. b. stars can form inside a nebula but a nebula can never be produced by any star. c. stars can never form inside a nebula but a nebula can be produced by any star. d. a nebula always has a higher density than a star. reset submit