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BIOS 256: week 6 Questions and Answers 100% Solved $12.99   Añadir al carrito

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BIOS 256: week 6 Questions and Answers 100% Solved

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BIOS 256: week 6 Questions and Answers 100% Solved

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  • 19 de septiembre de 2024
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BIOS 256: week 6 Questions and Answers 100% Solved


two types of chromosomes Correct Ans-- the chromosome types are divided into two


categories, autosomes and sex chromosome


- XX = female


- XY = male




autosomes Correct Ans-- are structures that contain the hereditary information


- they do not contain information related to reproduction and sex determination


- they are identical in both sexes, i.e., male and female species of humans


- there are 46 (2n) chromosomes in humans


- of these 46 chromosomes, there are 44 pairs of autosomes and contain information related


to the phenotypic characters


> physical features

, BIOS 256: week 6 Questions and Answers 100% Solved
allosomes/heterosomes Correct Ans-- are sex chromosomes that are different from


autosomes in form, behavior and size


- there are two allosomes in humans


> the X chromosomes are present in the ovum and either the X or Y chromosome can be


present in the sperm


- these chromosomes help in determination of sex of the progeny


- if the offspring receives X chromosome from the mother as well as father, it results in a


female child (XX)


- if the offspring receives one X and one Y chromosome from the parents, it results in a male


child (XY)


- in simple words, it is the donation of X or Y chromosome by the father that helps the


determination of the sex of the child




sperm Correct Ans-- male sex cells

, BIOS 256: week 6 Questions and Answers 100% Solved
oocytes Correct Ans-- also called eggs


- female sex cell




sex cell production Correct Ans-- sex cells have 1 set of genetic instructions found on 23


chromosomes, compared to 2 sets of 46 chromosomes in other body cells


- when the sperm and egg unite at fertilization, the genetic information carried on 46


chromosomes is restored


- sex cells are produced by a special type of cell division called meiosis




meiosis Correct Ans-- includes 2 successive divisions, called the first (meiosis I) and second


(meiosis II) meiotic divisions


- prior to meiosis, each chromosomes replicates and contains 2 DNA strands, called


chromatids, connected by a centromere




somatic cells Correct Ans-- diploid cells

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