Answer: 1/64 would be normal
Explanation:
Let the woman phenotype be Yy, since a carrier is usually heterozygous;
Also let the husband phenotype be Yy
Then Yy seperate to yield two alleles "Y" and "y"
So, the cross of the two alleles:
"Y", "y" X "Y", "y"
F1 will be YY, Yy, Yy and yy
From the crossing,
- the normal phenotype are YY,
-the carriers are Yy, Yy
- while yy is recessive.
Since, the probability that one of their offspring is normal is 1/4; for three children, then 1/4 x 1/4 x 1/4 = 1/64
Thus, probability that all three children are normal is 1/64
Carbon, Oxygen , nitrogen, hydrogen and phosphorus
Answer:
Genetic variation would decline rapidly, with sperm or ova having the same alleles.
Explanation:
Crossing over is the exchange of genetic material between the chromatids of homologous chromosomes. It results in the formation of recombinant chromatids that have new combinations of maternal and paternal alleles. The gametes with recombinant alleles impart genetic variations to the progeny.
Likewise, an independent assortment of homologous chromosomes to the opposite poles during anaphase I of meiosis I result in the packing of alleles of a gene independent of that of the other gene. Independent assortment produces some gametes with new gene combinations and the other with parental gene combinations.
If crossing over and independent assortment cease to occur, male and female gametes will have the same alleles due to the absence of any source of recombination and the genetic variation in the progeny would be reduced.
Answer:
1.A. Glycolysis;
2.A. fermentation pathways;
3.C. electron transport chain;
4.A. less.
Explanation:
Anaerobic respiration involves breakdown of glucose molecule to produce energy in the absence of oxygen, while during aerobic respiration, glucose completely breaks down to produce energy, and carbon dioxide and water as byproducts.
'Both aerobic and anaerobic respiration involve 'the process of glycolysis' to produce ATP and NADH molecules' as glycolysis is a universal process that takes place in all living organisms.
In anaerobic respiration, NAD+ molecules, used in glycolysis are regenerated from NADH by 'fermentation pathways' while in aerobic respiration NAD+ are regenerated from NADH during 'electron transport chain.'
During anaerobic respiration, partial oxidation of glucose takes place that produce a 'less amount of ATP molecules' than aerobic respiration. It produces only 2 ATP molecules per molecule of glucose while aerobic respiration produces 32 ATP molecules per molecule of glucose.