Answer:
Hemophilia is a X-linked recessive disease. Tim is not correct in his thinking because he can not pass the condition to his son. Only mother can pass it to sons since they get X chromosome from the mother. Father gives Y chromosome to sons which does not carry the hemophilic gene.
Tim and Stephanie's son can be hemophilic even when neither of the parents are hemophilic. In this case, Stephanie must be a carrier i.e. heterozygous for the trait.
Tim : XHY (normal)
Stephanie : XHXh (normal but carrier)
Their children:
XH Y
XH XHXH XHY
Xh XHXh XhY
As clear by the punnett square, all the daughters will be normal (half will be carriers like Stephanie). Half of the sons will be normal (XHY) and other half will have hemophilia (XhY).
Answer:
Rising temperatures also increase the rate at which plants transpire water into the air to keep cool, so irrigated farmland would need more water.
Explanation:
Answer:
phyllotaxy
photosynthesis
chloroplasts
chlorophyll
energy
oxidation
oxygen
reduction
independent
stroma
Explanation:
The arrangement of leaves that provide maximum exposure to sunlight is referred to as leaf phyllotaxy that reduces overlapping and overshadowing of leaves and supports maximum photosynsthesis.
The contains numerous chlorophyll molecules that trap the light energy for the oxidation of water and producing oxygen (O2) atoms required for carbon (IV) oxide reduction in light-independent, which takes place in the stroma of the chloroplast.
Hence, the correct answer in a sequential manner is as follows:
phyllotaxy
photosynthesis
chloroplasts
chlorophyll
energy
oxidation
oxygen
reduction
independent
stroma
