Close

2021-05-14

What is a mating between a dominant phenotype individual and a homozygous recessive individual used to determine the unknown allele in the dominant individual?

What is a mating between a dominant phenotype individual and a homozygous recessive individual used to determine the unknown allele in the dominant individual?

A testcross is a mating between an individual with a dominant phenotype (but unknown genotype) and a homozygous recessive individual.

What is the genetic cross between an individual showing a dominant phenotype but of unknown genotype and a homozygous recessive individual called?

The test cross is another fundamental tool devised by Gregor Mendel. In its simplest form, a test cross is an experimental cross of an individual organism of dominant phenotype but unknown genotype and an organism with a homozygous recessive genotype (and phenotype).

Is true breeding homozygous or heterozygous?

A true-breeding plant is one that, when self-fertilized, only produces offspring with the same traits. True-breeding organisms are genetically identical and have identical alleles for specified traits. The alleles for these type of organisms are homozygous.

When individuals are true breeding they can be?

Homozygous individuals are true-breeding because they have only one type of allele to pass to their offspring ex: AA.

What is another term for true breeding?

A true-breeding organism, sometimes also called a purebred, is an organism that always passes down certain phenotypic traits (i.e. physically expressed traits) to its offspring of many generations. In a purebred strain or breed, the goal is that the organism will “breed true” for the breed-relevant traits.

Which description of plants from a true breeding strain is correct?

Which description of plants from a true breeding strain is correct? They only have one allele of the gene that controls the trait of interest. Drosphila females are capable of storing sperm and using it to fertilize eggs long after mating.

What is pure breeding genotype?

A group of identical individuals that always produce offspring of the same phenotype when intercrossed.

Are purebreds homozygous?

Purebred – Also called HOMOZYGOUS and consists of gene pairs with genes that are the SAME. Hybrid – Also called HETEROZYGOUS and consists of gene pairs that are DIFFERENT. Genotype is the actual GENE makeup represented by LETTERS.

What are the characteristic features of true breeding line?

Characteristics if true breeding is as follows:

  • It undergoes self-pollination.
  • It depicts stability in the inheritance for several generations.
  • Provide gametes with similar traits, hence used as parents for artificial hybridisation.
  • Homozygous recessive plants are used to identify the genotype through a test cross.

What does homozygous mean?

Homozygous describes the genetic condition or the genetic state where an individual has inherited the same DNA sequence for a particular gene from both their biological mother and their biological father. It’s often used in the context of disease. We would then say that individual is homozygous for that mutation.

What does it mean to be heterozygous and homozygous?

Heterozygous refers to having inherited different forms of a particular gene from each parent. A heterozygous genotype stands in contrast to a homozygous genotype, where an individual inherits identical forms of a particular gene from each parent.

What is another term for heterozygous?

In this page you can discover 11 synonyms, antonyms, idiomatic expressions, and related words for heterozygous, like: homozygous, allele, C282Y, recessive, genotype, rb1, MTHFR, premutation, wild-type, homozygote and heterozygote.

How many loci are in heterozygous condition?

Types of gametes produced by organism= 2n wherein n= number of loci for which the organism is heterozygous. The given diploid organism is heterozygous for 4 loci, types of gametes produced = 24= 16.

What is the difference between hemizygous and heterozygous?

Homozygous describes a genotype consisting of two identical alleles at a given locus, heterozygous describes a genotype consisting of two different alleles at a locus, hemizygous describes a genotype consisting of only a single copy of a particular gene in an otherwise diploid organism, and nullizygous refers to an …

Which chromosome has most genes?

chromosome 1

What is a Hemizygous male?

Listen to pronunciation. (HEH-mee-ZY-gus) Describes an individual who has only one member of a chromosome pair or chromosome segment rather than the usual two. Hemizygosity is often used to describe X-linked genes in males who have only one X chromosome.

Can men be homozygous?

Females (XX) have two copies of each gene on the X chromosome, so they can be heterozygous or homozygous for a given allele. However, males (XY) will express all the alleles present on the single X chromosome that they receive from their mother, and concepts such as ‘dominant’ or ‘recessive’ are irrelevant.