Answer:
50% of their children are likely to be carriers of cystic fibrosis
Explanation:
Since the normal allele "F" will be the dominant allele while the mutated CFR allele "f" will be the recessive allele, <u>the gene (pair of alleles) of the person that is a CFR carrier will be "Ff" while that of the normal person who isn't a carrier will be "FF"</u>. The attachment shows the crossing between the two parents. From the illustration in the attachment, for every 4 children given birth to, 2 of them will likely be normal, "FF", (not a carrier and doesn't have cystic fibrosis) while 2 others will likely be carriers of cystic fibrosis (Ff). Hence, 50% of their children are likely to be carriers of cystic fibrosis.
The answer's are
3. A.
4. B.
Copper, Sulfur, and Oxygen are three examples of Elements, which can be easily located under the "Periodic Table".
The "small animals diversify quickly" is true about life on Earth at this time.
<u>Option: D</u>
<u>Explanation:</u>
The appearance of the Cenozoic period took place with the vanishing of the dinosaurs, this scenario is nearly 65 million years earlier, which is continued till today. This era has been splited into two periods of time named as the Tertiary and the Quaternary. There were inevitably number of vacant spaces on Planet where animals could survive after the dinosaurs' absence.
Immediately after their extinction, several vacant areas have been studied in nature where animals could flourish. At the start of the Cenozoic the mammals which were small, mouse resembling animals getting scattered rapidly and also diversified quickly in nature, their size also started increasing. Massive elephants and rhinos, sabre-tooth cats and lions, horses and deers quickly got populated in Earth's plains and forests.