【单选题】基因型中控制相对性状的基因组成是相同的,称为
【单选题】在鸡冠、眼睑等无毛少毛的皮肤处,出现红色或紫黑色丘疹、脓疱的病是( )
【单选题】Which is NOT true of the people in the study?
A.
They'll be from various areas.
B.
They'll be from all income levels.
C.
They'll be from all educational levels.
D.
They'll be from all age groups.
【单选题】甜豌豆的紫花对白花是一对相对性状,两对基因共同控制,遵循自由组合定律,只有当同时存在两个显性基因(A和B)时,花中的紫色素才能合成。下列说法中正确的是()
B.
紫花甜豌豆自交,后代中紫花和白花的比例一定不是3∶1
C.
AaBb的紫花甜豌豆自交,后代中紫花和白花甜豌豆之比为9∶7
D.
若杂交后代性状分离比为3∶5,则亲本基因型只能是AaBb和aaBb
【单选题】Which is NOT true of the people in the study?
A.
They'll be from various areas.
B.
They' 11 be from all income levels.
C.
They'll be from all educational levels.
D.
They'll be from all age groups.
【简答题】某城市出租车起价为5元(3km以内),以后每千米(不足1千米按整千米算) 1.5 元,某人乘出租车行驶13.5km需付费多少元?
【单选题】在鸡冠眼睑等无毛少毛的皮肤处,出现红色或紫黑色丘疹脓泡的病是( )
【单选题】一般纳税人接受原材料投资转入时,其实收资本入账金额为( )。