Punnett square are used to predict the possibility of different outcomes. when looking at one trait at a time it is called a monohybrid cross. you completed these last year. complete the review problem below. review: cross a heterozygous male for tallness with a homozygous recessive female for tallness. then give the genotype and phenotype ratios. dihybrid crosses involve tracking two traits simultaneously. for example, we can predict the outcome for offspring as the traits for both height and color are concerned.

Genotype Ratio: 1:1 (2 Tt and 2 tt)

Phenotypic Ratio: 1:1 (2 are presumably tall and 2 are presumably short)

Explanation:

When you cross heterozygous male (Tt) with a homozygous female (tt) you will get a 1:1 genotypic ratio and a 1:1 phenotypic ratio.

Tt x tt

= Tt Tt tt tt

the corpus luteum secretes estrogens and progesterone. the latter hormone causes changes in the uterus that make it more suitable for implantation of the fertilized ovum and the nourishment of the embryo. if the egg is not fertilized, the corpus luteum becomes inactive after 10–14 days, and menstruation occurs.

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. ph changes the ability of them he enzyme to dissolve in water.