B.freezing of glaciers
C.extremely hot weather
D.a river flowing into the sea
The answer is D, a river flowing into the sea as this dilutes the salt water with fresh water.
The male human has a sperm cell and the female has an egg cell. The cells from the male and female that combine to form a zygote are called gametes. The human sperm and egg cells each contain 23 chromosomes. . A combination of gametes forms a zygote with 46 chromosomes. The type of cell division that produces gametes with half the normal chromosome number is the meiosis. Meiosis is the type of cell division used in sexual reproduction. It will occur in the testes and ovaries.
The gametes B and C are the ones that contain one or more recombinant chromosomes, option 4 is correct.
Recombinant chromosomes are formed through the process of genetic recombination, where genetic material is exchanged between homologous chromosomes during meiosis. The exchange of genetic material results in new combinations of alleles on the chromosomes.
The B and C gametes are likely to contain recombinant chromosomes because they are a result of the crossing over and recombination that occurs during meiosis. Gamete B is likely to have undergone genetic recombination, as it carries a combination of alleles from both homologous chromosomes. Similarly, gamete C is also likely to contain recombinant chromosomes due to the recombination process.
The other options may not necessarily contain recombinant chromosomes, as they may have inherited intact, non-recombined chromosomes from the parent cells during meiosis, option A is correct.
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The correct question is:
Which of these gametes contains one or more recombinant chromosomes?
1. A and C
2. A and B
3. D and E
4. B and C
5. A and D
B: separation anxiety
C: separation shock
D: attachment shock