Answer:
genes for flower color and edge shape are linked. They do not assort independently.
Explanation:
<u>Available data:</u>
- test cross between a purple-flowered pea plant having serrated leaves and a white-flowered pea plant having smooth edges.
- serrated leaves → dominant trait
- smooth edges → recessive trait
- purple color → dominant trait
- white color → recessive trait
- F1: 4 purple-serrated:1 purple-smooth:1 white-serrated:4 white-smooth.
There are two genes involved in the cross. The expected ratios are 1:1:1:1 because we assume genes assort independently. However, we see a different phenotypic distribution. When phenotypic ratios differ from the expected ones, it means that genes are linked.
To know if two genes are linked in the same chromosome, we must observe the progeny distribution. If individuals, whose genes assort independently, are test crossed, they produce a progeny with equal phenotypic frequencies 1:1:1:1. But if instead of this distribution, we observe a different one, that is that phenotypes appear in different proportions, we can assume that genes are linked in the double heterozygote parent
Answer:
Ossification, or osteogenesis, is the process of bone formation by osteoblasts. ... The development of bone from fibrous membranes is called intramembranous ossification; development from hyaline cartilage is called endochondral ossification. Bone growth continues until approximately age 25.
Explanation:
Answer: C. Measles
Explanation:
Measles is a contagious disease which is caused by the Rubeola virus. It is an airborne disease which spread easily through sneezes and coughs of the infected person. It may also caused due to direct contact with the nasal secretions. It can spread when people share a common living space and lack immunity to fight against the disease causing symptoms.
The symptoms include cough, inflamed eyes, red rashes all over the body and begins with fever.
On the basis of the above information, measles is the disease due to which the client must be placed in a respiratory isolation so as to prevent the infection to other people.
Explanation:
Recessive alleles lack the power to express the phenotypic traits of an organism. In order for the specific trait to be expressed, 2 copies of the recessive allele or homogenous recessive genotype is needed in the organism.
Answer:
2nd trimester
Explanation
Brain start to be developed in this stage and so a lot of nutrients supplied to them and hence rapid cell division occur which led to rapid growth
