Answer:
1/2
Explanation:
let the alleles of the heterozygous woman without hemophilia be = Xhx
And the alleles of the man with hemophilia be XhY
If both XhY × Xhx; we have:
Xh Y
Xh XhXh XhY
x Xhx xY
XhXh and XhY are affected by the diseases
Xhx is a carrier
xY is normal
∴ the probability(chance) that their first child will have the disease is 2/4 of the total offspring
=1/2
∴ the probability (chance) that their first child will have the disease is 1/2
Answer:
it can come from the atmosphere,
Explanation:
Answer:
all of the above is correct.
Answer:
c. Affected fathers have all affected daughters, but no affected sons.
Explanation:
Given that the disease is caused by a dominant allele on X chromosome, an affected father would have a disease allele in the X chromosome that passes along to the male gamete, while the gametes containing a Y chromosome would not have it (since it is X-linked).
During sexual reproduction, the father passes an X chromosome to its daughters (the second X chromosome being contributed by the mother) but an Y chromosome to its sons (the single X chromosome being contributed by the mother).
Indeed, within an affected father's offspring, all his daughters will receive the affected X chromosome from him, while his sons will receive an unaffected Y chromosome (since the disease is X-linked). These males will not inherit the disease, for they will receive an unaffected X chromosome from her mother (which is expected to be healthy since the disease is rare).
Answer:
Animal
Explanation:
Animal and plant cells both carry out cellular respiration to generate ATP molecules that store energy for cellular processes. However, only plants have chlorophyll that taps on sunlight for photosynthesis. Plants use photosynthesis to create carbohydrates that are ‘burned’ in cellular respiration for energy.
