The pop up question at the end of this level asks why examining dna is better than considering physical traits , when do you have to rely on physical traits instead of dna

Question 1: Why examining dna is better ?

Examining DNA has a greater interest than examining physical traits because it can determine the genotype of the individual and what are the two alleles that he possesses while examining its physical traits only gives us the phenotype of the individual, which has a lower value than the genotype.

Question 2:

DNA testing is more expensive than examining physical traits, so that in most cases physical features are used to study trait transmission.

There is one case where the determination of the physical trait is sufficient to determine the genotype of the individual: this is when studying codominant alleles such as ABO grouping.

the level of progesterone is low at the pre-ovulatory phase of the cycle but it gradually increases and the levels are high at the luteal phase. if pregnancy occurs, the level of progesterone will be high throughout the pregnancy.

if egg is fertilized and the mother gets pregnant, progesterone starts preparing the uterus for the implantation. it starts building up the lining of uterus and make it hostile of the period of pregnancy.

flooding wildfire landslides climate change the factors listed have an immediate effect on the animal populations found in any habitat. the four factors would lead to a death. b emigration. eliminate c immigration. d mutations.