The child of a mother with IAIA blood and father with IAIB blood will have:
A. 25% chance of being IAIA.
B. 50% chance of being IAIA.
C. 75% chance of being IAIA.
D. 25% chance of being IAIB.
E. 50% chance of being IBIB.
B
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Your mother has albinism, which is a recessive trait. Your father has cystic fibrosis, which is also a recessive trait
You discover that your new father-in-law has albinism and cystic fibrosis. If neither you nor your spouse has either albinism or cystic fibrosis, what are the odds that your first child will have neither albinism nor cystic fibrosis?
a. 1/16 b. 3/8 c. 1/8 d. 9/16 e. 0
In a salt-wedge estuary the relationship between salinity and depth is that salinity:
a. is even from top to bottom. b. increases with depth. c. changes abruptly with depth. d. varies horizontally. e. decreases with depth.
The bodies of arthropods are supported mainly by
a. an exoskeleton. b. only nonskeletal structures. c. a hydrostatic skeleton. d. an endoskeleton. e. joined exo- and endoskeletons.
Biologists suspect that endosymbiosis gave rise to mitochondria before plastids partly because
a. the products of photosynthesis could not be metabolized without mitochondrial enzymes. b. almost all eukaryotes have mitochondria, whereas only autotrophic eukaryotes generally have plastids. c. mitochondrial DNA is less similar to prokaryotic DNA than is plastid DNA. d. without mitochondrial CO2 production, photosynthesis could not occur. e. mitochondrial proteins are synthesized on cytosolic ribosomes, whereas plastids utilize their own ribosomes.