The temrm refers to the ability for each cell of an embryo to form all structure

Question

The temrm refers to the ability for each cell of an embryo to form all structures of the organism. Select one a. induction b totipotency O c. mitosis O d. primary induction True or talse? In a hypothetical experiment carried out by Volhard and Wieschaus, male fruit flies were exposed to the chemical mutagen bromouracil. Males were crossed with wild-type females, producing F1 offspring. and 1/4 displayed lethal developmental mutations. The results are expected in a cross involving mutated males and normal wild-type females Select one O True O False

Explanation / Answer

1. Option B

Totipotency of the cell is defined as the ability of a cell to differentiate into any type of cell. It is usually present in embryo.

2. False

Lethal allele are genes that are mutated. This can lead to death of the organism because the gene that is mutated may be responsible for development. There are 2 types of lethal allele they are recessive allele and dominant allele.

In recessive condition, both parents are heterozygous and 1/4 of the child is fully affected

In dominant condition, if one gene is present then it leads to the dominant lethal mutation. In this case 1/2 of the offspring is affected if one parent affected and has heterozygous condition or all offspring is affected if the parent affected is homozygous.This type usually does not exist because they are died before passing the gene to the next generation.

The given question is contradictory to the above statements

3. Option D

Fertilization takes place in oviduct. In mammals this is known as fallopian tube or uterine tube. The egg is released from the ovary and gets fertilised in the oviduct (fallopian tube ) When it is mated with sperm. The fertilised egg gets implanted in the uterus

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