Answer the following questions true (T) or false (F)
1. In recombination (crossing over), DNA is exchanged between homologous, non-sister chromatids.
2. In humans, the sperm contributes the chromosome that determines whether the child will be a boy or a girl.
3. If an egg is fertilized by a sperm carrying an X chromosome, the resulting child might be either a boy or a girl, depending on the sex chromosome carried by the egg.
1. TRUE
2. TRUE
3. FALSE
You might also like to view...
The dermal endoskeleton of echinoderms is made of
a. cartilage. b. bone. c. calcium carbonate. d. chitin.
Answer the following questions true (T) or false (F)
1. What causes geographic isolation for one kind of organism may not be isolating for another kind of organism. 2. Speciation can occur without dramatic anatomical or genetic change. 3. Speciation can never occur unless populations become separated by a geographic barrier.
The modern synthesisis NOT based on ____
a. connecting microevolution and macroevolution b. bridging Darwinism with Mendel's work c. focusing on population genetics d. linking population growth with variation to explain natural selection e. interpreting data from a variety of biological disciplines in an evolutionary framework
What important structure uses lenticels to communicate with the atmosphere in mangroves?
a. Pneumatophores b. Aerenchyme c. Chromatophores d. Nutritive roots