In squash plants, the allele for yellow fruit (y) is dominant to the allele for green fruit (y). a plant with genotype yy is crossed with a plant with genotype yy.

what are the expected genotype percentages in the offspring of this cross?

question options:

a)

100% heterozygous and 0% homozygous

b)

50% homozygous dominant and 50% heterozygous

c)

50% homozygous dominant and 50% homozygous recessive

d)

25% homozygous dominant, 50% heterozygous, and 25% homozygous recessive

the answer would be 50 dominant 50 recessive

sulfur dioxide

explanation: acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. these substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

the menstrual cycle – higher tier. negative feedback mechanisms affect the production of hormones in the menstrual cycle. oestrogen also stimulates the release of lh (luteinising hormone) from the pituitary gland, which in turn controls the production of progesterone.