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2021-05-15

How is the expression of sex linked genes different from the expression of autosomal chromosomes?

How is the expression of sex linked genes different from the expression of autosomal chromosomes?

The sex chromosomes are so named because of their shape but unlike autosomal pairs they are not identical in shape. Males have an X and a Y chromosome thus denoting males as XY. Traits carried on chrosomes 1-22 are autosomal traits. Traits carried on the X and Y chromosomes are sex linked traits.

How might a scientist determine whether a trait is sex linked by observing the offspring of several genetic crosses?

How might a scientist determine whether a trait is sex-linked by observing the offspring of several genetic crosses? If more males get the trait then the trait is sex-linked, because males inherit sex-linked traits more often. You just studied 8 terms!

How is incomplete dominance expressed in the phenotype?

How is incomplete dominance expressed in a phenotype? Neither gene is fully expressed, but they are mixed together. Looks different than both parents, introduces new “item.” Why might polygenic traits vary more in phenotype than do single-gene traits?

What term describes both alleles being expressed within an offspring?

codominance. A condition in which both alleles for a gene are fully expressed. Monohybrid cross. A cross between individuals that involves one pair of contrasting traits. Dihybrid cross.

What is a condition in which both alleles for a gene are fully expressed?

Codominance. a condition in which both alleles for a gene are fully expressed.

Which kind of allele is always expressed?

dominant allele

What molecule determines the characteristics a child will inherit?

The instructions for specifying the characteristics of an organism are carried in the DNA (deoxyribonucleic acid) molecule. DNA provides the information required for cell function, cell growth and reproduction.

What is the difference between recessive and dominant genes?

When an allele is dominant, the characteristic it is connected to will be expressed in an individual. When an allele is recessive, the characteristic it is connected to is less likely to be expressed. Recessive traits only manifest when both alleles are recessive in an individual.